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-rw-r--r--libevent/include/event2/buffer.h1077
-rw-r--r--libevent/include/event2/buffer_compat.h116
-rw-r--r--libevent/include/event2/bufferevent.h1024
-rw-r--r--libevent/include/event2/bufferevent_compat.h104
-rw-r--r--libevent/include/event2/bufferevent_ssl.h134
-rw-r--r--libevent/include/event2/bufferevent_struct.h116
-rw-r--r--libevent/include/event2/dns.h751
-rw-r--r--libevent/include/event2/dns_compat.h358
-rw-r--r--libevent/include/event2/dns_struct.h80
-rw-r--r--libevent/include/event2/event.h1672
-rw-r--r--libevent/include/event2/event_compat.h230
-rw-r--r--libevent/include/event2/event_struct.h180
-rw-r--r--libevent/include/event2/http.h1192
-rw-r--r--libevent/include/event2/http_compat.h94
-rw-r--r--libevent/include/event2/http_struct.h152
-rw-r--r--libevent/include/event2/keyvalq_struct.h80
-rw-r--r--libevent/include/event2/listener.h192
-rw-r--r--libevent/include/event2/rpc.h626
-rw-r--r--libevent/include/event2/rpc_compat.h61
-rw-r--r--libevent/include/event2/rpc_struct.h114
-rw-r--r--libevent/include/event2/tag.h146
-rw-r--r--libevent/include/event2/tag_compat.h49
-rw-r--r--libevent/include/event2/thread.h253
-rw-r--r--libevent/include/event2/util.h888
-rw-r--r--libevent/include/event2/visibility.h67
25 files changed, 9756 insertions, 0 deletions
diff --git a/libevent/include/event2/buffer.h b/libevent/include/event2/buffer.h
new file mode 100644
index 0000000..88af3ae
--- /dev/null
+++ b/libevent/include/event2/buffer.h
@@ -0,0 +1,1077 @@
+/*
+ * Copyright (c) 2007-2012 Niels Provos and Nick Mathewson
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ * derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+#ifndef EVENT2_BUFFER_H_INCLUDED_
+#define EVENT2_BUFFER_H_INCLUDED_
+
+/** @file event2/buffer.h
+
+ Functions for buffering data for network sending or receiving.
+
+ An evbuffer can be used for preparing data before sending it to
+ the network or conversely for reading data from the network.
+ Evbuffers try to avoid memory copies as much as possible. As a
+ result, evbuffers can be used to pass data around without actually
+ incurring the overhead of copying the data.
+
+ A new evbuffer can be allocated with evbuffer_new(), and can be
+ freed with evbuffer_free(). Most users will be using evbuffers via
+ the bufferevent interface. To access a bufferevent's evbuffers, use
+ bufferevent_get_input() and bufferevent_get_output().
+
+ There are several guidelines for using evbuffers.
+
+ - if you already know how much data you are going to add as a result
+ of calling evbuffer_add() multiple times, it makes sense to use
+ evbuffer_expand() first to make sure that enough memory is allocated
+ before hand.
+
+ - evbuffer_add_buffer() adds the contents of one buffer to the other
+ without incurring any unnecessary memory copies.
+
+ - evbuffer_add() and evbuffer_add_buffer() do not mix very well:
+ if you use them, you will wind up with fragmented memory in your
+ buffer.
+
+ - For high-performance code, you may want to avoid copying data into and out
+ of buffers. You can skip the copy step by using
+ evbuffer_reserve_space()/evbuffer_commit_space() when writing into a
+ buffer, and evbuffer_peek() when reading.
+
+ In Libevent 2.0 and later, evbuffers are represented using a linked
+ list of memory chunks, with pointers to the first and last chunk in
+ the chain.
+
+ As the contents of an evbuffer can be stored in multiple different
+ memory blocks, it cannot be accessed directly. Instead, evbuffer_pullup()
+ can be used to force a specified number of bytes to be contiguous. This
+ will cause memory reallocation and memory copies if the data is split
+ across multiple blocks. It is more efficient, however, to use
+ evbuffer_peek() if you don't require that the memory to be contiguous.
+ */
+
+#include <event2/visibility.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include <event2/event-config.h>
+#include <stdarg.h>
+#ifdef EVENT__HAVE_SYS_TYPES_H
+#include <sys/types.h>
+#endif
+#ifdef EVENT__HAVE_SYS_UIO_H
+#include <sys/uio.h>
+#endif
+#include <event2/util.h>
+
+/**
+ An evbuffer is an opaque data type for efficiently buffering data to be
+ sent or received on the network.
+
+ @see event2/event.h for more information
+*/
+struct evbuffer
+#ifdef EVENT_IN_DOXYGEN_
+{}
+#endif
+;
+
+/**
+ Pointer to a position within an evbuffer.
+
+ Used when repeatedly searching through a buffer. Calling any function
+ that modifies or re-packs the buffer contents may invalidate all
+ evbuffer_ptrs for that buffer. Do not modify or contruct these values
+ except with evbuffer_ptr_set.
+
+ An evbuffer_ptr can represent any position from the start of a buffer up
+ to a position immediately after the end of a buffer.
+
+ @see evbuffer_ptr_set()
+ */
+struct evbuffer_ptr {
+ ev_ssize_t pos;
+
+ /* Do not alter or rely on the values of fields: they are for internal
+ * use */
+ struct {
+ void *chain;
+ size_t pos_in_chain;
+ } internal_;
+};
+
+/** Describes a single extent of memory inside an evbuffer. Used for
+ direct-access functions.
+
+ @see evbuffer_reserve_space, evbuffer_commit_space, evbuffer_peek
+ */
+#ifdef EVENT__HAVE_SYS_UIO_H
+#define evbuffer_iovec iovec
+/* Internal use -- defined only if we are using the native struct iovec */
+#define EVBUFFER_IOVEC_IS_NATIVE_
+#else
+struct evbuffer_iovec {
+ /** The start of the extent of memory. */
+ void *iov_base;
+ /** The length of the extent of memory. */
+ size_t iov_len;
+};
+#endif
+
+/**
+ Allocate storage for a new evbuffer.
+
+ @return a pointer to a newly allocated evbuffer struct, or NULL if an error
+ occurred
+ */
+EVENT2_EXPORT_SYMBOL
+struct evbuffer *evbuffer_new(void);
+/**
+ Deallocate storage for an evbuffer.
+
+ @param buf pointer to the evbuffer to be freed
+ */
+EVENT2_EXPORT_SYMBOL
+void evbuffer_free(struct evbuffer *buf);
+
+/**
+ Enable locking on an evbuffer so that it can safely be used by multiple
+ threads at the same time.
+
+ NOTE: when locking is enabled, the lock will be held when callbacks are
+ invoked. This could result in deadlock if you aren't careful. Plan
+ accordingly!
+
+ @param buf An evbuffer to make lockable.
+ @param lock A lock object, or NULL if we should allocate our own.
+ @return 0 on success, -1 on failure.
+ */
+EVENT2_EXPORT_SYMBOL
+int evbuffer_enable_locking(struct evbuffer *buf, void *lock);
+
+/**
+ Acquire the lock on an evbuffer. Has no effect if locking was not enabled
+ with evbuffer_enable_locking.
+*/
+EVENT2_EXPORT_SYMBOL
+void evbuffer_lock(struct evbuffer *buf);
+
+/**
+ Release the lock on an evbuffer. Has no effect if locking was not enabled
+ with evbuffer_enable_locking.
+*/
+EVENT2_EXPORT_SYMBOL
+void evbuffer_unlock(struct evbuffer *buf);
+
+
+/** If this flag is set, then we will not use evbuffer_peek(),
+ * evbuffer_remove(), evbuffer_remove_buffer(), and so on to read bytes
+ * from this buffer: we'll only take bytes out of this buffer by
+ * writing them to the network (as with evbuffer_write_atmost), by
+ * removing them without observing them (as with evbuffer_drain),
+ * or by copying them all out at once (as with evbuffer_add_buffer).
+ *
+ * Using this option allows the implementation to use sendfile-based
+ * operations for evbuffer_add_file(); see that function for more
+ * information.
+ *
+ * This flag is on by default for bufferevents that can take advantage
+ * of it; you should never actually need to set it on a bufferevent's
+ * output buffer.
+ */
+#define EVBUFFER_FLAG_DRAINS_TO_FD 1
+
+/** Change the flags that are set for an evbuffer by adding more.
+ *
+ * @param buffer the evbuffer that the callback is watching.
+ * @param cb the callback whose status we want to change.
+ * @param flags One or more EVBUFFER_FLAG_* options
+ * @return 0 on success, -1 on failure.
+ */
+EVENT2_EXPORT_SYMBOL
+int evbuffer_set_flags(struct evbuffer *buf, ev_uint64_t flags);
+/** Change the flags that are set for an evbuffer by removing some.
+ *
+ * @param buffer the evbuffer that the callback is watching.
+ * @param cb the callback whose status we want to change.
+ * @param flags One or more EVBUFFER_FLAG_* options
+ * @return 0 on success, -1 on failure.
+ */
+EVENT2_EXPORT_SYMBOL
+int evbuffer_clear_flags(struct evbuffer *buf, ev_uint64_t flags);
+
+/**
+ Returns the total number of bytes stored in the evbuffer
+
+ @param buf pointer to the evbuffer
+ @return the number of bytes stored in the evbuffer
+*/
+EVENT2_EXPORT_SYMBOL
+size_t evbuffer_get_length(const struct evbuffer *buf);
+
+/**
+ Returns the number of contiguous available bytes in the first buffer chain.
+
+ This is useful when processing data that might be split into multiple
+ chains, or that might all be in the first chain. Calls to
+ evbuffer_pullup() that cause reallocation and copying of data can thus be
+ avoided.
+
+ @param buf pointer to the evbuffer
+ @return 0 if no data is available, otherwise the number of available bytes
+ in the first buffer chain.
+*/
+EVENT2_EXPORT_SYMBOL
+size_t evbuffer_get_contiguous_space(const struct evbuffer *buf);
+
+/**
+ Expands the available space in an evbuffer.
+
+ Expands the available space in the evbuffer to at least datlen, so that
+ appending datlen additional bytes will not require any new allocations.
+
+ @param buf the evbuffer to be expanded
+ @param datlen the new minimum length requirement
+ @return 0 if successful, or -1 if an error occurred
+*/
+EVENT2_EXPORT_SYMBOL
+int evbuffer_expand(struct evbuffer *buf, size_t datlen);
+
+/**
+ Reserves space in the last chain or chains of an evbuffer.
+
+ Makes space available in the last chain or chains of an evbuffer that can
+ be arbitrarily written to by a user. The space does not become
+ available for reading until it has been committed with
+ evbuffer_commit_space().
+
+ The space is made available as one or more extents, represented by
+ an initial pointer and a length. You can force the memory to be
+ available as only one extent. Allowing more extents, however, makes the
+ function more efficient.
+
+ Multiple subsequent calls to this function will make the same space
+ available until evbuffer_commit_space() has been called.
+
+ It is an error to do anything that moves around the buffer's internal
+ memory structures before committing the space.
+
+ NOTE: The code currently does not ever use more than two extents.
+ This may change in future versions.
+
+ @param buf the evbuffer in which to reserve space.
+ @param size how much space to make available, at minimum. The
+ total length of the extents may be greater than the requested
+ length.
+ @param vec an array of one or more evbuffer_iovec structures to
+ hold pointers to the reserved extents of memory.
+ @param n_vec The length of the vec array. Must be at least 1;
+ 2 is more efficient.
+ @return the number of provided extents, or -1 on error.
+ @see evbuffer_commit_space()
+*/
+EVENT2_EXPORT_SYMBOL
+int
+evbuffer_reserve_space(struct evbuffer *buf, ev_ssize_t size,
+ struct evbuffer_iovec *vec, int n_vec);
+
+/**
+ Commits previously reserved space.
+
+ Commits some of the space previously reserved with
+ evbuffer_reserve_space(). It then becomes available for reading.
+
+ This function may return an error if the pointer in the extents do
+ not match those returned from evbuffer_reserve_space, or if data
+ has been added to the buffer since the space was reserved.
+
+ If you want to commit less data than you got reserved space for,
+ modify the iov_len pointer of the appropriate extent to a smaller
+ value. Note that you may have received more space than you
+ requested if it was available!
+
+ @param buf the evbuffer in which to reserve space.
+ @param vec one or two extents returned by evbuffer_reserve_space.
+ @param n_vecs the number of extents.
+ @return 0 on success, -1 on error
+ @see evbuffer_reserve_space()
+*/
+EVENT2_EXPORT_SYMBOL
+int evbuffer_commit_space(struct evbuffer *buf,
+ struct evbuffer_iovec *vec, int n_vecs);
+
+/**
+ Append data to the end of an evbuffer.
+
+ @param buf the evbuffer to be appended to
+ @param data pointer to the beginning of the data buffer
+ @param datlen the number of bytes to be copied from the data buffer
+ @return 0 on success, -1 on failure.
+ */
+EVENT2_EXPORT_SYMBOL
+int evbuffer_add(struct evbuffer *buf, const void *data, size_t datlen);
+
+
+/**
+ Read data from an evbuffer and drain the bytes read.
+
+ If more bytes are requested than are available in the evbuffer, we
+ only extract as many bytes as were available.
+
+ @param buf the evbuffer to be read from
+ @param data the destination buffer to store the result
+ @param datlen the maximum size of the destination buffer
+ @return the number of bytes read, or -1 if we can't drain the buffer.
+ */
+EVENT2_EXPORT_SYMBOL
+int evbuffer_remove(struct evbuffer *buf, void *data, size_t datlen);
+
+/**
+ Read data from an evbuffer, and leave the buffer unchanged.
+
+ If more bytes are requested than are available in the evbuffer, we
+ only extract as many bytes as were available.
+
+ @param buf the evbuffer to be read from
+ @param data_out the destination buffer to store the result
+ @param datlen the maximum size of the destination buffer
+ @return the number of bytes read, or -1 if we can't drain the buffer.
+ */
+EVENT2_EXPORT_SYMBOL
+ev_ssize_t evbuffer_copyout(struct evbuffer *buf, void *data_out, size_t datlen);
+
+/**
+ Read data from the middle of an evbuffer, and leave the buffer unchanged.
+
+ If more bytes are requested than are available in the evbuffer, we
+ only extract as many bytes as were available.
+
+ @param buf the evbuffer to be read from
+ @param pos the position to start reading from
+ @param data_out the destination buffer to store the result
+ @param datlen the maximum size of the destination buffer
+ @return the number of bytes read, or -1 if we can't drain the buffer.
+ */
+EVENT2_EXPORT_SYMBOL
+ev_ssize_t evbuffer_copyout_from(struct evbuffer *buf, const struct evbuffer_ptr *pos, void *data_out, size_t datlen);
+
+/**
+ Read data from an evbuffer into another evbuffer, draining
+ the bytes from the source buffer. This function avoids copy
+ operations to the extent possible.
+
+ If more bytes are requested than are available in src, the src
+ buffer is drained completely.
+
+ @param src the evbuffer to be read from
+ @param dst the destination evbuffer to store the result into
+ @param datlen the maximum numbers of bytes to transfer
+ @return the number of bytes read
+ */
+EVENT2_EXPORT_SYMBOL
+int evbuffer_remove_buffer(struct evbuffer *src, struct evbuffer *dst,
+ size_t datlen);
+
+/** Used to tell evbuffer_readln what kind of line-ending to look for.
+ */
+enum evbuffer_eol_style {
+ /** Any sequence of CR and LF characters is acceptable as an
+ * EOL.
+ *
+ * Note that this style can produce ambiguous results: the
+ * sequence "CRLF" will be treated as a single EOL if it is
+ * all in the buffer at once, but if you first read a CR from
+ * the network and later read an LF from the network, it will
+ * be treated as two EOLs.
+ */
+ EVBUFFER_EOL_ANY,
+ /** An EOL is an LF, optionally preceded by a CR. This style is
+ * most useful for implementing text-based internet protocols. */
+ EVBUFFER_EOL_CRLF,
+ /** An EOL is a CR followed by an LF. */
+ EVBUFFER_EOL_CRLF_STRICT,
+ /** An EOL is a LF. */
+ EVBUFFER_EOL_LF,
+ /** An EOL is a NUL character (that is, a single byte with value 0) */
+ EVBUFFER_EOL_NUL
+};
+
+/**
+ * Read a single line from an evbuffer.
+ *
+ * Reads a line terminated by an EOL as determined by the evbuffer_eol_style
+ * argument. Returns a newly allocated nul-terminated string; the caller must
+ * free the returned value. The EOL is not included in the returned string.
+ *
+ * @param buffer the evbuffer to read from
+ * @param n_read_out if non-NULL, points to a size_t that is set to the
+ * number of characters in the returned string. This is useful for
+ * strings that can contain NUL characters.
+ * @param eol_style the style of line-ending to use.
+ * @return pointer to a single line, or NULL if an error occurred
+ */
+EVENT2_EXPORT_SYMBOL
+char *evbuffer_readln(struct evbuffer *buffer, size_t *n_read_out,
+ enum evbuffer_eol_style eol_style);
+
+/**
+ Move all data from one evbuffer into another evbuffer.
+
+ This is a destructive add. The data from one buffer moves into
+ the other buffer. However, no unnecessary memory copies occur.
+
+ @param outbuf the output buffer
+ @param inbuf the input buffer
+ @return 0 if successful, or -1 if an error occurred
+
+ @see evbuffer_remove_buffer()
+ */
+EVENT2_EXPORT_SYMBOL
+int evbuffer_add_buffer(struct evbuffer *outbuf, struct evbuffer *inbuf);
+
+/**
+ Copy data from one evbuffer into another evbuffer.
+
+ This is a non-destructive add. The data from one buffer is copied
+ into the other buffer. However, no unnecessary memory copies occur.
+
+ Note that buffers already containing buffer references can't be added
+ to other buffers.
+
+ @param outbuf the output buffer
+ @param inbuf the input buffer
+ @return 0 if successful, or -1 if an error occurred
+ */
+EVENT2_EXPORT_SYMBOL
+int evbuffer_add_buffer_reference(struct evbuffer *outbuf,
+ struct evbuffer *inbuf);
+
+/**
+ A cleanup function for a piece of memory added to an evbuffer by
+ reference.
+
+ @see evbuffer_add_reference()
+ */
+typedef void (*evbuffer_ref_cleanup_cb)(const void *data,
+ size_t datalen, void *extra);
+
+/**
+ Reference memory into an evbuffer without copying.
+
+ The memory needs to remain valid until all the added data has been
+ read. This function keeps just a reference to the memory without
+ actually incurring the overhead of a copy.
+
+ @param outbuf the output buffer
+ @param data the memory to reference
+ @param datlen how memory to reference
+ @param cleanupfn callback to be invoked when the memory is no longer
+ referenced by this evbuffer.
+ @param cleanupfn_arg optional argument to the cleanup callback
+ @return 0 if successful, or -1 if an error occurred
+ */
+EVENT2_EXPORT_SYMBOL
+int evbuffer_add_reference(struct evbuffer *outbuf,
+ const void *data, size_t datlen,
+ evbuffer_ref_cleanup_cb cleanupfn, void *cleanupfn_arg);
+
+/**
+ Copy data from a file into the evbuffer for writing to a socket.
+
+ This function avoids unnecessary data copies between userland and
+ kernel. If sendfile is available and the EVBUFFER_FLAG_DRAINS_TO_FD
+ flag is set, it uses those functions. Otherwise, it tries to use
+ mmap (or CreateFileMapping on Windows).
+
+ The function owns the resulting file descriptor and will close it
+ when finished transferring data.
+
+ The results of using evbuffer_remove() or evbuffer_pullup() on
+ evbuffers whose data was added using this function are undefined.
+
+ For more fine-grained control, use evbuffer_add_file_segment.
+
+ @param outbuf the output buffer
+ @param fd the file descriptor
+ @param offset the offset from which to read data
+ @param length how much data to read, or -1 to read as much as possible.
+ (-1 requires that 'fd' support fstat.)
+ @return 0 if successful, or -1 if an error occurred
+*/
+
+EVENT2_EXPORT_SYMBOL
+int evbuffer_add_file(struct evbuffer *outbuf, int fd, ev_off_t offset,
+ ev_off_t length);
+
+/**
+ An evbuffer_file_segment holds a reference to a range of a file --
+ possibly the whole file! -- for use in writing from an evbuffer to a
+ socket. It could be implemented with mmap, sendfile, splice, or (if all
+ else fails) by just pulling all the data into RAM. A single
+ evbuffer_file_segment can be added more than once, and to more than one
+ evbuffer.
+ */
+struct evbuffer_file_segment;
+
+/**
+ Flag for creating evbuffer_file_segment: If this flag is set, then when
+ the evbuffer_file_segment is freed and no longer in use by any
+ evbuffer, the underlying fd is closed.
+ */
+#define EVBUF_FS_CLOSE_ON_FREE 0x01
+/**
+ Flag for creating evbuffer_file_segment: Disable memory-map based
+ implementations.
+ */
+#define EVBUF_FS_DISABLE_MMAP 0x02
+/**
+ Flag for creating evbuffer_file_segment: Disable direct fd-to-fd
+ implementations (including sendfile and splice).
+
+ You might want to use this option if data needs to be taken from the
+ evbuffer by any means other than writing it to the network: the sendfile
+ backend is fast, but it only works for sending files directly to the
+ network.
+ */
+#define EVBUF_FS_DISABLE_SENDFILE 0x04
+/**
+ Flag for creating evbuffer_file_segment: Do not allocate a lock for this
+ segment. If this option is set, then neither the segment nor any
+ evbuffer it is added to may ever be accessed from more than one thread
+ at a time.
+ */
+#define EVBUF_FS_DISABLE_LOCKING 0x08
+
+/**
+ A cleanup function for a evbuffer_file_segment added to an evbuffer
+ for reference.
+ */
+typedef void (*evbuffer_file_segment_cleanup_cb)(
+ struct evbuffer_file_segment const* seg, int flags, void* arg);
+
+/**
+ Create and return a new evbuffer_file_segment for reading data from a
+ file and sending it out via an evbuffer.
+
+ This function avoids unnecessary data copies between userland and
+ kernel. Where available, it uses sendfile or splice.
+
+ The file descriptor must not be closed so long as any evbuffer is using
+ this segment.
+
+ The results of using evbuffer_remove() or evbuffer_pullup() or any other
+ function that reads bytes from an evbuffer on any evbuffer containing
+ the newly returned segment are undefined, unless you pass the
+ EVBUF_FS_DISABLE_SENDFILE flag to this function.
+
+ @param fd an open file to read from.
+ @param offset an index within the file at which to start reading
+ @param length how much data to read, or -1 to read as much as possible.
+ (-1 requires that 'fd' support fstat.)
+ @param flags any number of the EVBUF_FS_* flags
+ @return a new evbuffer_file_segment, or NULL on failure.
+ **/
+EVENT2_EXPORT_SYMBOL
+struct evbuffer_file_segment *evbuffer_file_segment_new(
+ int fd, ev_off_t offset, ev_off_t length, unsigned flags);
+
+/**
+ Free an evbuffer_file_segment
+
+ It is safe to call this function even if the segment has been added to
+ one or more evbuffers. The evbuffer_file_segment will not be freed
+ until no more references to it exist.
+ */
+EVENT2_EXPORT_SYMBOL
+void evbuffer_file_segment_free(struct evbuffer_file_segment *seg);
+
+/**
+ Add cleanup callback and argument for the callback to an
+ evbuffer_file_segment.
+
+ The cleanup callback will be invoked when no more references to the
+ evbuffer_file_segment exist.
+ **/
+EVENT2_EXPORT_SYMBOL
+void evbuffer_file_segment_add_cleanup_cb(struct evbuffer_file_segment *seg,
+ evbuffer_file_segment_cleanup_cb cb, void* arg);
+
+/**
+ Insert some or all of an evbuffer_file_segment at the end of an evbuffer
+
+ Note that the offset and length parameters of this function have a
+ different meaning from those provided to evbuffer_file_segment_new: When
+ you create the segment, the offset is the offset _within the file_, and
+ the length is the length _of the segment_, whereas when you add a
+ segment to an evbuffer, the offset is _within the segment_ and the
+ length is the length of the _part of the segment you want to use.
+
+ In other words, if you have a 10 KiB file, and you create an
+ evbuffer_file_segment for it with offset 20 and length 1000, it will
+ refer to bytes 20..1019 inclusive. If you then pass this segment to
+ evbuffer_add_file_segment and specify an offset of 20 and a length of
+ 50, you will be adding bytes 40..99 inclusive.
+
+ @param buf the evbuffer to append to
+ @param seg the segment to add
+ @param offset the offset within the segment to start from
+ @param length the amount of data to add, or -1 to add it all.
+ @return 0 on success, -1 on failure.
+ */
+EVENT2_EXPORT_SYMBOL
+int evbuffer_add_file_segment(struct evbuffer *buf,
+ struct evbuffer_file_segment *seg, ev_off_t offset, ev_off_t length);
+
+/**
+ Append a formatted string to the end of an evbuffer.
+
+ The string is formated as printf.
+
+ @param buf the evbuffer that will be appended to
+ @param fmt a format string
+ @param ... arguments that will be passed to printf(3)
+ @return The number of bytes added if successful, or -1 if an error occurred.
+
+ @see evutil_printf(), evbuffer_add_vprintf()
+ */
+EVENT2_EXPORT_SYMBOL
+int evbuffer_add_printf(struct evbuffer *buf, const char *fmt, ...)
+#ifdef __GNUC__
+ __attribute__((format(printf, 2, 3)))
+#endif
+;
+
+/**
+ Append a va_list formatted string to the end of an evbuffer.
+
+ @param buf the evbuffer that will be appended to
+ @param fmt a format string
+ @param ap a varargs va_list argument array that will be passed to vprintf(3)
+ @return The number of bytes added if successful, or -1 if an error occurred.
+ */
+EVENT2_EXPORT_SYMBOL
+int evbuffer_add_vprintf(struct evbuffer *buf, const char *fmt, va_list ap)
+#ifdef __GNUC__
+ __attribute__((format(printf, 2, 0)))
+#endif
+;
+
+
+/**
+ Remove a specified number of bytes data from the beginning of an evbuffer.
+
+ @param buf the evbuffer to be drained
+ @param len the number of bytes to drain from the beginning of the buffer
+ @return 0 on success, -1 on failure.
+ */
+EVENT2_EXPORT_SYMBOL
+int evbuffer_drain(struct evbuffer *buf, size_t len);
+
+
+/**
+ Write the contents of an evbuffer to a file descriptor.
+
+ The evbuffer will be drained after the bytes have been successfully written.
+
+ @param buffer the evbuffer to be written and drained
+ @param fd the file descriptor to be written to
+ @return the number of bytes written, or -1 if an error occurred
+ @see evbuffer_read()
+ */
+EVENT2_EXPORT_SYMBOL
+int evbuffer_write(struct evbuffer *buffer, evutil_socket_t fd);
+
+/**
+ Write some of the contents of an evbuffer to a file descriptor.
+
+ The evbuffer will be drained after the bytes have been successfully written.
+
+ @param buffer the evbuffer to be written and drained
+ @param fd the file descriptor to be written to
+ @param howmuch the largest allowable number of bytes to write, or -1
+ to write as many bytes as we can.
+ @return the number of bytes written, or -1 if an error occurred
+ @see evbuffer_read()
+ */
+EVENT2_EXPORT_SYMBOL
+int evbuffer_write_atmost(struct evbuffer *buffer, evutil_socket_t fd,
+ ev_ssize_t howmuch);
+
+/**
+ Read from a file descriptor and store the result in an evbuffer.
+
+ @param buffer the evbuffer to store the result
+ @param fd the file descriptor to read from
+ @param howmuch the number of bytes to be read. If the given number is negative
+ or out of maximum bytes per one read, as many bytes as we can will be read.
+ @return the number of bytes read, or -1 if an error occurred
+ @see evbuffer_write()
+ */
+EVENT2_EXPORT_SYMBOL
+int evbuffer_read(struct evbuffer *buffer, evutil_socket_t fd, int howmuch);
+
+/**
+ Search for a string within an evbuffer.
+
+ @param buffer the evbuffer to be searched
+ @param what the string to be searched for
+ @param len the length of the search string
+ @param start NULL or a pointer to a valid struct evbuffer_ptr.
+ @return a struct evbuffer_ptr whose 'pos' field has the offset of the
+ first occurrence of the string in the buffer after 'start'. The 'pos'
+ field of the result is -1 if the string was not found.
+ */
+EVENT2_EXPORT_SYMBOL
+struct evbuffer_ptr evbuffer_search(struct evbuffer *buffer, const char *what, size_t len, const struct evbuffer_ptr *start);
+
+/**
+ Search for a string within part of an evbuffer.
+
+ @param buffer the evbuffer to be searched
+ @param what the string to be searched for
+ @param len the length of the search string
+ @param start NULL or a pointer to a valid struct evbuffer_ptr that
+ indicates where we should start searching.
+ @param end NULL or a pointer to a valid struct evbuffer_ptr that
+ indicates where we should stop searching.
+ @return a struct evbuffer_ptr whose 'pos' field has the offset of the
+ first occurrence of the string in the buffer after 'start'. The 'pos'
+ field of the result is -1 if the string was not found.
+ */
+EVENT2_EXPORT_SYMBOL
+struct evbuffer_ptr evbuffer_search_range(struct evbuffer *buffer, const char *what, size_t len, const struct evbuffer_ptr *start, const struct evbuffer_ptr *end);
+
+/**
+ Defines how to adjust an evbuffer_ptr by evbuffer_ptr_set()
+
+ @see evbuffer_ptr_set() */
+enum evbuffer_ptr_how {
+ /** Sets the pointer to the position; can be called on with an
+ uninitialized evbuffer_ptr. */
+ EVBUFFER_PTR_SET,
+ /** Advances the pointer by adding to the current position. */
+ EVBUFFER_PTR_ADD
+};
+
+/**
+ Sets the search pointer in the buffer to position.
+
+ There are two ways to use this function: you can call
+ evbuffer_ptr_set(buf, &pos, N, EVBUFFER_PTR_SET)
+ to move 'pos' to a position 'N' bytes after the start of the buffer, or
+ evbuffer_ptr_set(buf, &pos, N, EVBUFFER_PTR_ADD)
+ to move 'pos' forward by 'N' bytes.
+
+ If evbuffer_ptr is not initialized, this function can only be called
+ with EVBUFFER_PTR_SET.
+
+ An evbuffer_ptr can represent any position from the start of the buffer to
+ a position immediately after the end of the buffer.
+
+ @param buffer the evbuffer to be search
+ @param ptr a pointer to a struct evbuffer_ptr
+ @param position the position at which to start the next search
+ @param how determines how the pointer should be manipulated.
+ @returns 0 on success or -1 otherwise
+*/
+EVENT2_EXPORT_SYMBOL
+int
+evbuffer_ptr_set(struct evbuffer *buffer, struct evbuffer_ptr *ptr,
+ size_t position, enum evbuffer_ptr_how how);
+
+/**
+ Search for an end-of-line string within an evbuffer.
+
+ @param buffer the evbuffer to be searched
+ @param start NULL or a pointer to a valid struct evbuffer_ptr to start
+ searching at.
+ @param eol_len_out If non-NULL, the pointed-to value will be set to
+ the length of the end-of-line string.
+ @param eol_style The kind of EOL to look for; see evbuffer_readln() for
+ more information
+ @return a struct evbuffer_ptr whose 'pos' field has the offset of the
+ first occurrence EOL in the buffer after 'start'. The 'pos'
+ field of the result is -1 if the string was not found.
+ */
+EVENT2_EXPORT_SYMBOL
+struct evbuffer_ptr evbuffer_search_eol(struct evbuffer *buffer,
+ struct evbuffer_ptr *start, size_t *eol_len_out,
+ enum evbuffer_eol_style eol_style);
+
+/** Function to peek at data inside an evbuffer without removing it or
+ copying it out.
+
+ Pointers to the data are returned by filling the 'vec_out' array
+ with pointers to one or more extents of data inside the buffer.
+
+ The total data in the extents that you get back may be more than
+ you requested (if there is more data last extent than you asked
+ for), or less (if you do not provide enough evbuffer_iovecs, or if
+ the buffer does not have as much data as you asked to see).
+
+ @param buffer the evbuffer to peek into,
+ @param len the number of bytes to try to peek. If len is negative, we
+ will try to fill as much of vec_out as we can. If len is negative
+ and vec_out is not provided, we return the number of evbuffer_iovecs
+ that would be needed to get all the data in the buffer.
+ @param start_at an evbuffer_ptr indicating the point at which we
+ should start looking for data. NULL means, "At the start of the
+ buffer."
+ @param vec_out an array of evbuffer_iovec
+ @param n_vec the length of vec_out. If 0, we only count how many
+ extents would be necessary to point to the requested amount of
+ data.
+ @return The number of extents needed. This may be less than n_vec
+ if we didn't need all the evbuffer_iovecs we were given, or more
+ than n_vec if we would need more to return all the data that was
+ requested.
+ */
+EVENT2_EXPORT_SYMBOL
+int evbuffer_peek(struct evbuffer *buffer, ev_ssize_t len,
+ struct evbuffer_ptr *start_at,
+ struct evbuffer_iovec *vec_out, int n_vec);
+
+
+/** Structure passed to an evbuffer_cb_func evbuffer callback
+
+ @see evbuffer_cb_func, evbuffer_add_cb()
+ */
+struct evbuffer_cb_info {
+ /** The number of bytes in this evbuffer when callbacks were last
+ * invoked. */
+ size_t orig_size;
+ /** The number of bytes added since callbacks were last invoked. */
+ size_t n_added;
+ /** The number of bytes removed since callbacks were last invoked. */
+ size_t n_deleted;
+};
+
+/** Type definition for a callback that is invoked whenever data is added or
+ removed from an evbuffer.
+
+ An evbuffer may have one or more callbacks set at a time. The order
+ in which they are executed is undefined.
+
+ A callback function may add more callbacks, or remove itself from the
+ list of callbacks, or add or remove data from the buffer. It may not
+ remove another callback from the list.
+
+ If a callback adds or removes data from the buffer or from another
+ buffer, this can cause a recursive invocation of your callback or
+ other callbacks. If you ask for an infinite loop, you might just get
+ one: watch out!
+
+ @param buffer the buffer whose size has changed
+ @param info a structure describing how the buffer changed.
+ @param arg a pointer to user data
+*/
+typedef void (*evbuffer_cb_func)(struct evbuffer *buffer, const struct evbuffer_cb_info *info, void *arg);
+
+struct evbuffer_cb_entry;
+/** Add a new callback to an evbuffer.
+
+ Subsequent calls to evbuffer_add_cb() add new callbacks. To remove this
+ callback, call evbuffer_remove_cb or evbuffer_remove_cb_entry.
+
+ @param buffer the evbuffer to be monitored
+ @param cb the callback function to invoke when the evbuffer is modified,
+ or NULL to remove all callbacks.
+ @param cbarg an argument to be provided to the callback function
+ @return a handle to the callback on success, or NULL on failure.
+ */
+EVENT2_EXPORT_SYMBOL
+struct evbuffer_cb_entry *evbuffer_add_cb(struct evbuffer *buffer, evbuffer_cb_func cb, void *cbarg);
+
+/** Remove a callback from an evbuffer, given a handle returned from
+ evbuffer_add_cb.
+
+ Calling this function invalidates the handle.
+
+ @return 0 if a callback was removed, or -1 if no matching callback was
+ found.
+ */
+EVENT2_EXPORT_SYMBOL
+int evbuffer_remove_cb_entry(struct evbuffer *buffer,
+ struct evbuffer_cb_entry *ent);
+
+/** Remove a callback from an evbuffer, given the function and argument
+ used to add it.
+
+ @return 0 if a callback was removed, or -1 if no matching callback was
+ found.
+ */
+EVENT2_EXPORT_SYMBOL
+int evbuffer_remove_cb(struct evbuffer *buffer, evbuffer_cb_func cb, void *cbarg);
+
+/** If this flag is not set, then a callback is temporarily disabled, and
+ * should not be invoked.
+ *
+ * @see evbuffer_cb_set_flags(), evbuffer_cb_clear_flags()
+ */
+#define EVBUFFER_CB_ENABLED 1
+
+/** Change the flags that are set for a callback on a buffer by adding more.
+
+ @param buffer the evbuffer that the callback is watching.
+ @param cb the callback whose status we want to change.
+ @param flags EVBUFFER_CB_ENABLED to re-enable the callback.
+ @return 0 on success, -1 on failure.
+ */
+EVENT2_EXPORT_SYMBOL
+int evbuffer_cb_set_flags(struct evbuffer *buffer,
+ struct evbuffer_cb_entry *cb, ev_uint32_t flags);
+
+/** Change the flags that are set for a callback on a buffer by removing some
+
+ @param buffer the evbuffer that the callback is watching.
+ @param cb the callback whose status we want to change.
+ @param flags EVBUFFER_CB_ENABLED to disable the callback.
+ @return 0 on success, -1 on failure.
+ */
+EVENT2_EXPORT_SYMBOL
+int evbuffer_cb_clear_flags(struct evbuffer *buffer,
+ struct evbuffer_cb_entry *cb, ev_uint32_t flags);
+
+#if 0
+/** Postpone calling a given callback until unsuspend is called later.
+
+ This is different from disabling the callback, since the callback will get
+ invoked later if the buffer size changes between now and when we unsuspend
+ it.
+
+ @param the buffer that the callback is watching.
+ @param cb the callback we want to suspend.
+ */
+EVENT2_EXPORT_SYMBOL
+void evbuffer_cb_suspend(struct evbuffer *buffer, struct evbuffer_cb_entry *cb);
+/** Stop postponing a callback that we postponed with evbuffer_cb_suspend.
+
+ If data was added to or removed from the buffer while the callback was
+ suspended, the callback will get called once now.
+
+ @param the buffer that the callback is watching.
+ @param cb the callback we want to stop suspending.
+ */
+EVENT2_EXPORT_SYMBOL
+void evbuffer_cb_unsuspend(struct evbuffer *buffer, struct evbuffer_cb_entry *cb);
+#endif
+
+/**
+ Makes the data at the beginning of an evbuffer contiguous.
+
+ @param buf the evbuffer to make contiguous
+ @param size the number of bytes to make contiguous, or -1 to make the
+ entire buffer contiguous.
+ @return a pointer to the contiguous memory array, or NULL if param size
+ requested more data than is present in the buffer.
+*/
+
+EVENT2_EXPORT_SYMBOL
+unsigned char *evbuffer_pullup(struct evbuffer *buf, ev_ssize_t size);
+
+/**
+ Prepends data to the beginning of the evbuffer
+
+ @param buf the evbuffer to which to prepend data
+ @param data a pointer to the memory to prepend
+ @param size the number of bytes to prepend
+ @return 0 if successful, or -1 otherwise
+*/
+
+EVENT2_EXPORT_SYMBOL
+int evbuffer_prepend(struct evbuffer *buf, const void *data, size_t size);
+
+/**
+ Prepends all data from the src evbuffer to the beginning of the dst
+ evbuffer.
+
+ @param dst the evbuffer to which to prepend data
+ @param src the evbuffer to prepend; it will be emptied as a result
+ @return 0 if successful, or -1 otherwise
+*/
+EVENT2_EXPORT_SYMBOL
+int evbuffer_prepend_buffer(struct evbuffer *dst, struct evbuffer* src);
+
+/**
+ Prevent calls that modify an evbuffer from succeeding. A buffer may
+ frozen at the front, at the back, or at both the front and the back.
+
+ If the front of a buffer is frozen, operations that drain data from
+ the front of the buffer, or that prepend data to the buffer, will
+ fail until it is unfrozen. If the back a buffer is frozen, operations
+ that append data from the buffer will fail until it is unfrozen.
+
+ @param buf The buffer to freeze
+ @param at_front If true, we freeze the front of the buffer. If false,
+ we freeze the back.
+ @return 0 on success, -1 on failure.
+*/
+EVENT2_EXPORT_SYMBOL
+int evbuffer_freeze(struct evbuffer *buf, int at_front);
+/**
+ Re-enable calls that modify an evbuffer.
+
+ @param buf The buffer to un-freeze
+ @param at_front If true, we unfreeze the front of the buffer. If false,
+ we unfreeze the back.
+ @return 0 on success, -1 on failure.
+ */
+EVENT2_EXPORT_SYMBOL
+int evbuffer_unfreeze(struct evbuffer *buf, int at_front);
+
+struct event_base;
+/**
+ Force all the callbacks on an evbuffer to be run, not immediately after
+ the evbuffer is altered, but instead from inside the event loop.
+
+ This can be used to serialize all the callbacks to a single thread
+ of execution.
+ */
+EVENT2_EXPORT_SYMBOL
+int evbuffer_defer_callbacks(struct evbuffer *buffer, struct event_base *base);
+
+/**
+ Append data from 1 or more iovec's to an evbuffer
+
+ Calculates the number of bytes needed for an iovec structure and guarantees
+ all data will fit into a single chain. Can be used in lieu of functionality
+ which calls evbuffer_add() constantly before being used to increase
+ performance.
+
+ @param buffer the destination buffer
+ @param vec the source iovec
+ @param n_vec the number of iovec structures.
+ @return the number of bytes successfully written to the output buffer.
+*/
+EVENT2_EXPORT_SYMBOL
+size_t evbuffer_add_iovec(struct evbuffer * buffer, struct evbuffer_iovec * vec, int n_vec);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* EVENT2_BUFFER_H_INCLUDED_ */
diff --git a/libevent/include/event2/buffer_compat.h b/libevent/include/event2/buffer_compat.h
new file mode 100644
index 0000000..0ce1025
--- /dev/null
+++ b/libevent/include/event2/buffer_compat.h
@@ -0,0 +1,116 @@
+/*
+ * Copyright (c) 2007-2012 Niels Provos and Nick Mathewson
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ * derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef EVENT2_BUFFER_COMPAT_H_INCLUDED_
+#define EVENT2_BUFFER_COMPAT_H_INCLUDED_
+
+#include <event2/visibility.h>
+
+/** @file event2/buffer_compat.h
+
+ Obsolete and deprecated versions of the functions in buffer.h: provided
+ only for backward compatibility.
+ */
+
+
+/**
+ Obsolete alias for evbuffer_readln(buffer, NULL, EVBUFFER_EOL_ANY).
+
+ @deprecated This function is deprecated because its behavior is not correct
+ for almost any protocol, and also because it's wholly subsumed by
+ evbuffer_readln().
+
+ @param buffer the evbuffer to read from
+ @return pointer to a single line, or NULL if an error occurred
+
+*/
+EVENT2_EXPORT_SYMBOL
+char *evbuffer_readline(struct evbuffer *buffer);
+
+/** Type definition for a callback that is invoked whenever data is added or
+ removed from an evbuffer.
+
+ An evbuffer may have one or more callbacks set at a time. The order
+ in which they are executed is undefined.
+
+ A callback function may add more callbacks, or remove itself from the
+ list of callbacks, or add or remove data from the buffer. It may not
+ remove another callback from the list.
+
+ If a callback adds or removes data from the buffer or from another
+ buffer, this can cause a recursive invocation of your callback or
+ other callbacks. If you ask for an infinite loop, you might just get
+ one: watch out!
+
+ @param buffer the buffer whose size has changed
+ @param old_len the previous length of the buffer
+ @param new_len the current length of the buffer
+ @param arg a pointer to user data
+*/
+typedef void (*evbuffer_cb)(struct evbuffer *buffer, size_t old_len, size_t new_len, void *arg);
+
+/**
+ Replace all callbacks on an evbuffer with a single new callback, or
+ remove them.
+
+ Subsequent calls to evbuffer_setcb() replace callbacks set by previous
+ calls. Setting the callback to NULL removes any previously set callback.
+
+ @deprecated This function is deprecated because it clears all previous
+ callbacks set on the evbuffer, which can cause confusing behavior if
+ multiple parts of the code all want to add their own callbacks on a
+ buffer. Instead, use evbuffer_add(), evbuffer_del(), and
+ evbuffer_setflags() to manage your own evbuffer callbacks without
+ interfering with callbacks set by others.
+
+ @param buffer the evbuffer to be monitored
+ @param cb the callback function to invoke when the evbuffer is modified,
+ or NULL to remove all callbacks.
+ @param cbarg an argument to be provided to the callback function
+ @return 0 if successful, or -1 on error
+ */
+EVENT2_EXPORT_SYMBOL
+int evbuffer_setcb(struct evbuffer *buffer, evbuffer_cb cb, void *cbarg);
+
+
+/**
+ Find a string within an evbuffer.
+
+ @param buffer the evbuffer to be searched
+ @param what the string to be searched for
+ @param len the length of the search string
+ @return a pointer to the beginning of the search string, or NULL if the search failed.
+ */
+EVENT2_EXPORT_SYMBOL
+unsigned char *evbuffer_find(struct evbuffer *buffer, const unsigned char *what, size_t len);
+
+/** deprecated in favor of calling the functions directly */
+#define EVBUFFER_LENGTH(x) evbuffer_get_length(x)
+/** deprecated in favor of calling the functions directly */
+#define EVBUFFER_DATA(x) evbuffer_pullup((x), -1)
+
+#endif
+
diff --git a/libevent/include/event2/bufferevent.h b/libevent/include/event2/bufferevent.h
new file mode 100644
index 0000000..48cd153
--- /dev/null
+++ b/libevent/include/event2/bufferevent.h
@@ -0,0 +1,1024 @@
+/*
+ * Copyright (c) 2000-2007 Niels Provos <provos@citi.umich.edu>
+ * Copyright (c) 2007-2012 Niels Provos and Nick Mathewson
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ * derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+#ifndef EVENT2_BUFFEREVENT_H_INCLUDED_
+#define EVENT2_BUFFEREVENT_H_INCLUDED_
+
+/**
+ @file event2/bufferevent.h
+
+ Functions for buffering data for network sending or receiving. Bufferevents
+ are higher level than evbuffers: each has an underlying evbuffer for reading
+ and one for writing, and callbacks that are invoked under certain
+ circumstances.
+
+ A bufferevent provides input and output buffers that get filled and
+ drained automatically. The user of a bufferevent no longer deals
+ directly with the I/O, but instead is reading from input and writing
+ to output buffers.
+
+ Once initialized, the bufferevent structure can be used repeatedly
+ with bufferevent_enable() and bufferevent_disable().
+
+ When reading is enabled, the bufferevent will try to read from the
+ file descriptor onto its input buffer, and call the read callback.
+ When writing is enabled, the bufferevent will try to write data onto its
+ file descriptor when the output buffer has enough data, and call the write
+ callback when the output buffer is sufficiently drained.
+
+ Bufferevents come in several flavors, including:
+
+ <dl>
+ <dt>Socket-based bufferevents</dt>
+ <dd>A bufferevent that reads and writes data onto a network
+ socket. Created with bufferevent_socket_new().</dd>
+
+ <dt>Paired bufferevents</dt>
+ <dd>A pair of bufferevents that send and receive data to one
+ another without touching the network. Created with
+ bufferevent_pair_new().</dd>
+
+ <dt>Filtering bufferevents</dt>
+ <dd>A bufferevent that transforms data, and sends or receives it
+ over another underlying bufferevent. Created with
+ bufferevent_filter_new().</dd>
+
+ <dt>SSL-backed bufferevents</dt>
+ <dd>A bufferevent that uses the openssl library to send and
+ receive data over an encrypted connection. Created with
+ bufferevent_openssl_socket_new() or
+ bufferevent_openssl_filter_new().</dd>
+ </dl>
+ */
+
+#include <event2/visibility.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include <event2/event-config.h>
+#ifdef EVENT__HAVE_SYS_TYPES_H
+#include <sys/types.h>
+#endif
+#ifdef EVENT__HAVE_SYS_TIME_H
+#include <sys/time.h>
+#endif
+
+/* For int types. */
+#include <event2/util.h>
+
+/** @name Bufferevent event codes
+
+ These flags are passed as arguments to a bufferevent's event callback.
+
+ @{
+*/
+#define BEV_EVENT_READING 0x01 /**< error encountered while reading */
+#define BEV_EVENT_WRITING 0x02 /**< error encountered while writing */
+#define BEV_EVENT_EOF 0x10 /**< eof file reached */
+#define BEV_EVENT_ERROR 0x20 /**< unrecoverable error encountered */
+#define BEV_EVENT_TIMEOUT 0x40 /**< user-specified timeout reached */
+#define BEV_EVENT_CONNECTED 0x80 /**< connect operation finished. */
+/**@}*/
+
+/**
+ An opaque type for handling buffered IO
+
+ @see event2/bufferevent.h
+ */
+struct bufferevent
+#ifdef EVENT_IN_DOXYGEN_
+{}
+#endif
+;
+struct event_base;
+struct evbuffer;
+struct sockaddr;
+
+/**
+ A read or write callback for a bufferevent.
+
+ The read callback is triggered when new data arrives in the input
+ buffer and the amount of readable data exceed the low watermark
+ which is 0 by default.
+
+ The write callback is triggered if the write buffer has been
+ exhausted or fell below its low watermark.
+
+ @param bev the bufferevent that triggered the callback
+ @param ctx the user-specified context for this bufferevent
+ */
+typedef void (*bufferevent_data_cb)(struct bufferevent *bev, void *ctx);
+
+/**
+ An event/error callback for a bufferevent.
+
+ The event callback is triggered if either an EOF condition or another
+ unrecoverable error was encountered.
+
+ For bufferevents with deferred callbacks, this is a bitwise OR of all errors
+ that have happened on the bufferevent since the last callback invocation.
+
+ @param bev the bufferevent for which the error condition was reached
+ @param what a conjunction of flags: BEV_EVENT_READING or BEV_EVENT_WRITING
+ to indicate if the error was encountered on the read or write path,
+ and one of the following flags: BEV_EVENT_EOF, BEV_EVENT_ERROR,
+ BEV_EVENT_TIMEOUT, BEV_EVENT_CONNECTED.
+
+ @param ctx the user-specified context for this bufferevent
+*/
+typedef void (*bufferevent_event_cb)(struct bufferevent *bev, short what, void *ctx);
+
+/** Options that can be specified when creating a bufferevent */
+enum bufferevent_options {
+ /** If set, we close the underlying file
+ * descriptor/bufferevent/whatever when this bufferevent is freed. */
+ BEV_OPT_CLOSE_ON_FREE = (1<<0),
+
+ /** If set, and threading is enabled, operations on this bufferevent
+ * are protected by a lock */
+ BEV_OPT_THREADSAFE = (1<<1),
+
+ /** If set, callbacks are run deferred in the event loop. */
+ BEV_OPT_DEFER_CALLBACKS = (1<<2),
+
+ /** If set, callbacks are executed without locks being held on the
+ * bufferevent. This option currently requires that
+ * BEV_OPT_DEFER_CALLBACKS also be set; a future version of Libevent
+ * might remove the requirement.*/
+ BEV_OPT_UNLOCK_CALLBACKS = (1<<3)
+};
+
+/**
+ Create a new socket bufferevent over an existing socket.
+
+ @param base the event base to associate with the new bufferevent.
+ @param fd the file descriptor from which data is read and written to.
+ This file descriptor is not allowed to be a pipe(2).
+ It is safe to set the fd to -1, so long as you later
+ set it with bufferevent_setfd or bufferevent_socket_connect().
+ @param options Zero or more BEV_OPT_* flags
+ @return a pointer to a newly allocated bufferevent struct, or NULL if an
+ error occurred
+ @see bufferevent_free()
+ */
+EVENT2_EXPORT_SYMBOL
+struct bufferevent *bufferevent_socket_new(struct event_base *base, evutil_socket_t fd, int options);
+
+/**
+ Launch a connect() attempt with a socket-based bufferevent.
+
+ When the connect succeeds, the eventcb will be invoked with
+ BEV_EVENT_CONNECTED set.
+
+ If the bufferevent does not already have a socket set, we allocate a new
+ socket here and make it nonblocking before we begin.
+
+ If no address is provided, we assume that the socket is already connecting,
+ and configure the bufferevent so that a BEV_EVENT_CONNECTED event will be
+ yielded when it is done connecting.
+
+ @param bufev an existing bufferevent allocated with
+ bufferevent_socket_new().
+ @param addr the address we should connect to
+ @param socklen The length of the address
+ @return 0 on success, -1 on failure.
+ */
+EVENT2_EXPORT_SYMBOL
+int bufferevent_socket_connect(struct bufferevent *, const struct sockaddr *, int);
+
+struct evdns_base;
+/**
+ Resolve the hostname 'hostname' and connect to it as with
+ bufferevent_socket_connect().
+
+ @param bufev An existing bufferevent allocated with bufferevent_socket_new()
+ @param evdns_base Optionally, an evdns_base to use for resolving hostnames
+ asynchronously. May be set to NULL for a blocking resolve.
+ @param family A preferred address family to resolve addresses to, or
+ AF_UNSPEC for no preference. Only AF_INET, AF_INET6, and AF_UNSPEC are
+ supported.
+ @param hostname The hostname to resolve; see below for notes on recognized
+ formats
+ @param port The port to connect to on the resolved address.
+ @return 0 if successful, -1 on failure.
+
+ Recognized hostname formats are:
+
+ www.example.com (hostname)
+ 1.2.3.4 (ipv4address)
+ ::1 (ipv6address)
+ [::1] ([ipv6address])
+
+ Performance note: If you do not provide an evdns_base, this function
+ may block while it waits for a DNS response. This is probably not
+ what you want.
+ */
+EVENT2_EXPORT_SYMBOL
+int bufferevent_socket_connect_hostname(struct bufferevent *,
+ struct evdns_base *, int, const char *, int);
+
+/**
+ Return the error code for the last failed DNS lookup attempt made by
+ bufferevent_socket_connect_hostname().
+
+ @param bev The bufferevent object.
+ @return DNS error code.
+ @see evutil_gai_strerror()
+*/
+EVENT2_EXPORT_SYMBOL
+int bufferevent_socket_get_dns_error(struct bufferevent *bev);
+
+/**
+ Assign a bufferevent to a specific event_base.
+
+ NOTE that only socket bufferevents support this function.
+
+ @param base an event_base returned by event_init()
+ @param bufev a bufferevent struct returned by bufferevent_new()
+ or bufferevent_socket_new()
+ @return 0 if successful, or -1 if an error occurred
+ @see bufferevent_new()
+ */
+EVENT2_EXPORT_SYMBOL
+int bufferevent_base_set(struct event_base *base, struct bufferevent *bufev);
+
+/**
+ Return the event_base used by a bufferevent
+*/
+EVENT2_EXPORT_SYMBOL
+struct event_base *bufferevent_get_base(struct bufferevent *bev);
+
+/**
+ Assign a priority to a bufferevent.
+
+ Only supported for socket bufferevents.
+
+ @param bufev a bufferevent struct
+ @param pri the priority to be assigned
+ @return 0 if successful, or -1 if an error occurred
+ */
+EVENT2_EXPORT_SYMBOL
+int bufferevent_priority_set(struct bufferevent *bufev, int pri);
+
+/**
+ Return the priority of a bufferevent.
+
+ Only supported for socket bufferevents
+ */
+EVENT2_EXPORT_SYMBOL
+int bufferevent_get_priority(const struct bufferevent *bufev);
+
+/**
+ Deallocate the storage associated with a bufferevent structure.
+
+ If there is pending data to write on the bufferevent, it probably won't be
+ flushed before the bufferevent is freed.
+
+ @param bufev the bufferevent structure to be freed.
+ */
+EVENT2_EXPORT_SYMBOL
+void bufferevent_free(struct bufferevent *bufev);
+
+
+/**
+ Changes the callbacks for a bufferevent.
+
+ @param bufev the bufferevent object for which to change callbacks
+ @param readcb callback to invoke when there is data to be read, or NULL if
+ no callback is desired
+ @param writecb callback to invoke when the file descriptor is ready for
+ writing, or NULL if no callback is desired
+ @param eventcb callback to invoke when there is an event on the file
+ descriptor
+ @param cbarg an argument that will be supplied to each of the callbacks
+ (readcb, writecb, and errorcb)
+ @see bufferevent_new()
+ */
+EVENT2_EXPORT_SYMBOL
+void bufferevent_setcb(struct bufferevent *bufev,
+ bufferevent_data_cb readcb, bufferevent_data_cb writecb,
+ bufferevent_event_cb eventcb, void *cbarg);
+
+/**
+ Retrieves the callbacks for a bufferevent.
+
+ @param bufev the bufferevent to examine.
+ @param readcb_ptr if readcb_ptr is nonnull, *readcb_ptr is set to the current
+ read callback for the bufferevent.
+ @param writecb_ptr if writecb_ptr is nonnull, *writecb_ptr is set to the
+ current write callback for the bufferevent.
+ @param eventcb_ptr if eventcb_ptr is nonnull, *eventcb_ptr is set to the
+ current event callback for the bufferevent.
+ @param cbarg_ptr if cbarg_ptr is nonnull, *cbarg_ptr is set to the current
+ callback argument for the bufferevent.
+ @see buffervent_setcb()
+*/
+EVENT2_EXPORT_SYMBOL
+void bufferevent_getcb(struct bufferevent *bufev,
+ bufferevent_data_cb *readcb_ptr,
+ bufferevent_data_cb *writecb_ptr,
+ bufferevent_event_cb *eventcb_ptr,
+ void **cbarg_ptr);
+
+/**
+ Changes the file descriptor on which the bufferevent operates.
+ Not supported for all bufferevent types.
+
+ @param bufev the bufferevent object for which to change the file descriptor
+ @param fd the file descriptor to operate on
+*/
+EVENT2_EXPORT_SYMBOL
+int bufferevent_setfd(struct bufferevent *bufev, evutil_socket_t fd);
+
+/**
+ Returns the file descriptor associated with a bufferevent, or -1 if
+ no file descriptor is associated with the bufferevent.
+ */
+EVENT2_EXPORT_SYMBOL
+evutil_socket_t bufferevent_getfd(struct bufferevent *bufev);
+
+/**
+ Returns the underlying bufferevent associated with a bufferevent (if
+ the bufferevent is a wrapper), or NULL if there is no underlying bufferevent.
+ */
+EVENT2_EXPORT_SYMBOL
+struct bufferevent *bufferevent_get_underlying(struct bufferevent *bufev);
+
+/**
+ Write data to a bufferevent buffer.
+
+ The bufferevent_write() function can be used to write data to the file
+ descriptor. The data is appended to the output buffer and written to the
+ descriptor automatically as it becomes available for writing.
+
+ @param bufev the bufferevent to be written to
+ @param data a pointer to the data to be written
+ @param size the length of the data, in bytes
+ @return 0 if successful, or -1 if an error occurred
+ @see bufferevent_write_buffer()
+ */
+EVENT2_EXPORT_SYMBOL
+int bufferevent_write(struct bufferevent *bufev,
+ const void *data, size_t size);
+
+
+/**
+ Write data from an evbuffer to a bufferevent buffer. The evbuffer is
+ being drained as a result.
+
+ @param bufev the bufferevent to be written to
+ @param buf the evbuffer to be written
+ @return 0 if successful, or -1 if an error occurred
+ @see bufferevent_write()
+ */
+EVENT2_EXPORT_SYMBOL
+int bufferevent_write_buffer(struct bufferevent *bufev, struct evbuffer *buf);
+
+
+/**
+ Read data from a bufferevent buffer.
+
+ The bufferevent_read() function is used to read data from the input buffer.
+
+ @param bufev the bufferevent to be read from
+ @param data pointer to a buffer that will store the data
+ @param size the size of the data buffer, in bytes
+ @return the amount of data read, in bytes.
+ */
+EVENT2_EXPORT_SYMBOL
+size_t bufferevent_read(struct bufferevent *bufev, void *data, size_t size);
+
+/**
+ Read data from a bufferevent buffer into an evbuffer. This avoids
+ memory copies.
+
+ @param bufev the bufferevent to be read from
+ @param buf the evbuffer to which to add data
+ @return 0 if successful, or -1 if an error occurred.
+ */
+EVENT2_EXPORT_SYMBOL
+int bufferevent_read_buffer(struct bufferevent *bufev, struct evbuffer *buf);
+
+/**
+ Returns the input buffer.
+
+ The user MUST NOT set the callback on this buffer.
+
+ @param bufev the bufferevent from which to get the evbuffer
+ @return the evbuffer object for the input buffer
+ */
+
+EVENT2_EXPORT_SYMBOL
+struct evbuffer *bufferevent_get_input(struct bufferevent *bufev);
+
+/**
+ Returns the output buffer.
+
+ The user MUST NOT set the callback on this buffer.
+
+ When filters are being used, the filters need to be manually
+ triggered if the output buffer was manipulated.
+
+ @param bufev the bufferevent from which to get the evbuffer
+ @return the evbuffer object for the output buffer
+ */
+
+EVENT2_EXPORT_SYMBOL
+struct evbuffer *bufferevent_get_output(struct bufferevent *bufev);
+
+/**
+ Enable a bufferevent.
+
+ @param bufev the bufferevent to be enabled
+ @param event any combination of EV_READ | EV_WRITE.
+ @return 0 if successful, or -1 if an error occurred
+ @see bufferevent_disable()
+ */
+EVENT2_EXPORT_SYMBOL
+int bufferevent_enable(struct bufferevent *bufev, short event);
+
+/**
+ Disable a bufferevent.
+
+ @param bufev the bufferevent to be disabled
+ @param event any combination of EV_READ | EV_WRITE.
+ @return 0 if successful, or -1 if an error occurred
+ @see bufferevent_enable()
+ */
+EVENT2_EXPORT_SYMBOL
+int bufferevent_disable(struct bufferevent *bufev, short event);
+
+/**
+ Return the events that are enabled on a given bufferevent.
+
+ @param bufev the bufferevent to inspect
+ @return A combination of EV_READ | EV_WRITE
+ */
+EVENT2_EXPORT_SYMBOL
+short bufferevent_get_enabled(struct bufferevent *bufev);
+
+/**
+ Set the read and write timeout for a bufferevent.
+
+ A bufferevent's timeout will fire the first time that the indicated
+ amount of time has elapsed since a successful read or write operation,
+ during which the bufferevent was trying to read or write.
+
+ (In other words, if reading or writing is disabled, or if the
+ bufferevent's read or write operation has been suspended because
+ there's no data to write, or not enough bandwidth, or so on, the
+ timeout isn't active. The timeout only becomes active when we we're
+ willing to actually read or write.)
+
+ Calling bufferevent_enable or setting a timeout for a bufferevent
+ whose timeout is already pending resets its timeout.
+
+ If the timeout elapses, the corresponding operation (EV_READ or
+ EV_WRITE) becomes disabled until you re-enable it again. The
+ bufferevent's event callback is called with the
+ BEV_EVENT_TIMEOUT|BEV_EVENT_READING or
+ BEV_EVENT_TIMEOUT|BEV_EVENT_WRITING.
+
+ @param bufev the bufferevent to be modified
+ @param timeout_read the read timeout, or NULL
+ @param timeout_write the write timeout, or NULL
+ */
+EVENT2_EXPORT_SYMBOL
+int bufferevent_set_timeouts(struct bufferevent *bufev,
+ const struct timeval *timeout_read, const struct timeval *timeout_write);
+
+/**
+ Sets the watermarks for read and write events.
+
+ On input, a bufferevent does not invoke the user read callback unless
+ there is at least low watermark data in the buffer. If the read buffer
+ is beyond the high watermark, the bufferevent stops reading from the network.
+ But be aware that bufferevent input/read buffer can overrun high watermark
+ limit (typical example is openssl bufferevent), so you should not relay in
+ this.
+
+ On output, the user write callback is invoked whenever the buffered data
+ falls below the low watermark. Filters that write to this bufev will try
+ not to write more bytes to this buffer than the high watermark would allow,
+ except when flushing.
+
+ @param bufev the bufferevent to be modified
+ @param events EV_READ, EV_WRITE or both
+ @param lowmark the lower watermark to set
+ @param highmark the high watermark to set
+*/
+
+EVENT2_EXPORT_SYMBOL
+void bufferevent_setwatermark(struct bufferevent *bufev, short events,
+ size_t lowmark, size_t highmark);
+
+/**
+ Retrieves the watermarks for read or write events.
+ Returns non-zero if events contains not only EV_READ or EV_WRITE.
+ Returns zero if events equal EV_READ or EV_WRITE
+
+ @param bufev the bufferevent to be examined
+ @param events EV_READ or EV_WRITE
+ @param lowmark receives the lower watermark if not NULL
+ @param highmark receives the high watermark if not NULL
+*/
+EVENT2_EXPORT_SYMBOL
+int bufferevent_getwatermark(struct bufferevent *bufev, short events,
+ size_t *lowmark, size_t *highmark);
+
+/**
+ Acquire the lock on a bufferevent. Has no effect if locking was not
+ enabled with BEV_OPT_THREADSAFE.
+ */
+EVENT2_EXPORT_SYMBOL
+void bufferevent_lock(struct bufferevent *bufev);
+
+/**
+ Release the lock on a bufferevent. Has no effect if locking was not
+ enabled with BEV_OPT_THREADSAFE.
+ */
+EVENT2_EXPORT_SYMBOL
+void bufferevent_unlock(struct bufferevent *bufev);
+
+
+/**
+ * Public interface to manually increase the reference count of a bufferevent
+ * this is useful in situations where a user may reference the bufferevent
+ * somewhere else (unknown to libevent)
+ *
+ * @param bufev the bufferevent to increase the refcount on
+ *
+ */
+EVENT2_EXPORT_SYMBOL
+void bufferevent_incref(struct bufferevent *bufev);
+
+/**
+ * Public interface to manually decrement the reference count of a bufferevent
+ *
+ * Warning: make sure you know what you're doing. This is mainly used in
+ * conjunction with bufferevent_incref(). This will free up all data associated
+ * with a bufferevent if the reference count hits 0.
+ *
+ * @param bufev the bufferevent to decrement the refcount on
+ *
+ * @return 1 if the bufferevent was freed, otherwise 0 (still referenced)
+ */
+EVENT2_EXPORT_SYMBOL
+int bufferevent_decref(struct bufferevent *bufev);
+
+/**
+ Flags that can be passed into filters to let them know how to
+ deal with the incoming data.
+*/
+enum bufferevent_flush_mode {
+ /** usually set when processing data */
+ BEV_NORMAL = 0,
+
+ /** want to checkpoint all data sent. */
+ BEV_FLUSH = 1,
+
+ /** encountered EOF on read or done sending data */
+ BEV_FINISHED = 2
+};
+
+/**
+ Triggers the bufferevent to produce more data if possible.
+
+ @param bufev the bufferevent object
+ @param iotype either EV_READ or EV_WRITE or both.
+ @param mode either BEV_NORMAL or BEV_FLUSH or BEV_FINISHED
+ @return -1 on failure, 0 if no data was produces, 1 if data was produced
+ */
+EVENT2_EXPORT_SYMBOL
+int bufferevent_flush(struct bufferevent *bufev,
+ short iotype,
+ enum bufferevent_flush_mode mode);
+
+/**
+ Flags for bufferevent_trigger(_event) that modify when and how to trigger
+ the callback.
+*/
+enum bufferevent_trigger_options {
+ /** trigger the callback regardless of the watermarks */
+ BEV_TRIG_IGNORE_WATERMARKS = (1<<16),
+
+ /** defer even if the callbacks are not */
+ BEV_TRIG_DEFER_CALLBACKS = BEV_OPT_DEFER_CALLBACKS
+
+ /* (Note: for internal reasons, these need to be disjoint from
+ * bufferevent_options, except when they mean the same thing. */
+};
+
+/**
+ Triggers bufferevent data callbacks.
+
+ The function will honor watermarks unless options contain
+ BEV_TRIG_IGNORE_WATERMARKS. If the options contain BEV_OPT_DEFER_CALLBACKS,
+ the callbacks are deferred.
+
+ @param bufev the bufferevent object
+ @param iotype either EV_READ or EV_WRITE or both.
+ @param options
+ */
+EVENT2_EXPORT_SYMBOL
+void bufferevent_trigger(struct bufferevent *bufev, short iotype,
+ int options);
+
+/**
+ Triggers the bufferevent event callback.
+
+ If the options contain BEV_OPT_DEFER_CALLBACKS, the callbacks are deferred.
+
+ @param bufev the bufferevent object
+ @param what the flags to pass onto the event callback
+ @param options
+ */
+EVENT2_EXPORT_SYMBOL
+void bufferevent_trigger_event(struct bufferevent *bufev, short what,
+ int options);
+
+/**
+ @name Filtering support
+
+ @{
+*/
+/**
+ Values that filters can return.
+ */
+enum bufferevent_filter_result {
+ /** everything is okay */
+ BEV_OK = 0,
+
+ /** the filter needs to read more data before output */
+ BEV_NEED_MORE = 1,
+
+ /** the filter encountered a critical error, no further data
+ can be processed. */
+ BEV_ERROR = 2
+};
+
+/** A callback function to implement a filter for a bufferevent.
+
+ @param src An evbuffer to drain data from.
+ @param dst An evbuffer to add data to.
+ @param limit A suggested upper bound of bytes to write to dst.
+ The filter may ignore this value, but doing so means that
+ it will overflow the high-water mark associated with dst.
+ -1 means "no limit".
+ @param mode Whether we should write data as may be convenient
+ (BEV_NORMAL), or flush as much data as we can (BEV_FLUSH),
+ or flush as much as we can, possibly including an end-of-stream
+ marker (BEV_FINISH).
+ @param ctx A user-supplied pointer.
+
+ @return BEV_OK if we wrote some data; BEV_NEED_MORE if we can't
+ produce any more output until we get some input; and BEV_ERROR
+ on an error.
+ */
+typedef enum bufferevent_filter_result (*bufferevent_filter_cb)(
+ struct evbuffer *src, struct evbuffer *dst, ev_ssize_t dst_limit,
+ enum bufferevent_flush_mode mode, void *ctx);
+
+/**
+ Allocate a new filtering bufferevent on top of an existing bufferevent.
+
+ @param underlying the underlying bufferevent.
+ @param input_filter The filter to apply to data we read from the underlying
+ bufferevent
+ @param output_filter The filer to apply to data we write to the underlying
+ bufferevent
+ @param options A bitfield of bufferevent options.
+ @param free_context A function to use to free the filter context when
+ this bufferevent is freed.
+ @param ctx A context pointer to pass to the filter functions.
+ */
+EVENT2_EXPORT_SYMBOL
+struct bufferevent *
+bufferevent_filter_new(struct bufferevent *underlying,
+ bufferevent_filter_cb input_filter,
+ bufferevent_filter_cb output_filter,
+ int options,
+ void (*free_context)(void *),
+ void *ctx);
+/**@}*/
+
+/**
+ Allocate a pair of linked bufferevents. The bufferevents behave as would
+ two bufferevent_sock instances connected to opposite ends of a
+ socketpair(), except that no internal socketpair is allocated.
+
+ @param base The event base to associate with the socketpair.
+ @param options A set of options for this bufferevent
+ @param pair A pointer to an array to hold the two new bufferevent objects.
+ @return 0 on success, -1 on failure.
+ */
+EVENT2_EXPORT_SYMBOL
+int bufferevent_pair_new(struct event_base *base, int options,
+ struct bufferevent *pair[2]);
+
+/**
+ Given one bufferevent returned by bufferevent_pair_new(), returns the
+ other one if it still exists. Otherwise returns NULL.
+ */
+EVENT2_EXPORT_SYMBOL
+struct bufferevent *bufferevent_pair_get_partner(struct bufferevent *bev);
+
+/**
+ Abstract type used to configure rate-limiting on a bufferevent or a group
+ of bufferevents.
+ */
+struct ev_token_bucket_cfg;
+
+/**
+ A group of bufferevents which are configured to respect the same rate
+ limit.
+*/
+struct bufferevent_rate_limit_group;
+
+/** Maximum configurable rate- or burst-limit. */
+#define EV_RATE_LIMIT_MAX EV_SSIZE_MAX
+
+/**
+ Initialize and return a new object to configure the rate-limiting behavior
+ of bufferevents.
+
+ @param read_rate The maximum number of bytes to read per tick on
+ average.
+ @param read_burst The maximum number of bytes to read in any single tick.
+ @param write_rate The maximum number of bytes to write per tick on
+ average.
+ @param write_burst The maximum number of bytes to write in any single tick.
+ @param tick_len The length of a single tick. Defaults to one second.
+ Any fractions of a millisecond are ignored.
+
+ Note that all rate-limits hare are currently best-effort: future versions
+ of Libevent may implement them more tightly.
+ */
+EVENT2_EXPORT_SYMBOL
+struct ev_token_bucket_cfg *ev_token_bucket_cfg_new(
+ size_t read_rate, size_t read_burst,
+ size_t write_rate, size_t write_burst,
+ const struct timeval *tick_len);
+
+/** Free all storage held in 'cfg'.
+
+ Note: 'cfg' is not currently reference-counted; it is not safe to free it
+ until no bufferevent is using it.
+ */
+EVENT2_EXPORT_SYMBOL
+void ev_token_bucket_cfg_free(struct ev_token_bucket_cfg *cfg);
+
+/**
+ Set the rate-limit of a the bufferevent 'bev' to the one specified in
+ 'cfg'. If 'cfg' is NULL, disable any per-bufferevent rate-limiting on
+ 'bev'.
+
+ Note that only some bufferevent types currently respect rate-limiting.
+ They are: socket-based bufferevents (normal and IOCP-based), and SSL-based
+ bufferevents.
+
+ Return 0 on success, -1 on failure.
+ */
+EVENT2_EXPORT_SYMBOL
+int bufferevent_set_rate_limit(struct bufferevent *bev,
+ struct ev_token_bucket_cfg *cfg);
+
+/**
+ Create a new rate-limit group for bufferevents. A rate-limit group
+ constrains the maximum number of bytes sent and received, in toto,
+ by all of its bufferevents.
+
+ @param base An event_base to run any necessary timeouts for the group.
+ Note that all bufferevents in the group do not necessarily need to share
+ this event_base.
+ @param cfg The rate-limit for this group.
+
+ Note that all rate-limits hare are currently best-effort: future versions
+ of Libevent may implement them more tightly.
+
+ Note also that only some bufferevent types currently respect rate-limiting.
+ They are: socket-based bufferevents (normal and IOCP-based), and SSL-based
+ bufferevents.
+ */
+EVENT2_EXPORT_SYMBOL
+struct bufferevent_rate_limit_group *bufferevent_rate_limit_group_new(
+ struct event_base *base,
+ const struct ev_token_bucket_cfg *cfg);
+/**
+ Change the rate-limiting settings for a given rate-limiting group.
+
+ Return 0 on success, -1 on failure.
+*/
+EVENT2_EXPORT_SYMBOL
+int bufferevent_rate_limit_group_set_cfg(
+ struct bufferevent_rate_limit_group *,
+ const struct ev_token_bucket_cfg *);
+
+/**
+ Change the smallest quantum we're willing to allocate to any single
+ bufferevent in a group for reading or writing at a time.
+
+ The rationale is that, because of TCP/IP protocol overheads and kernel
+ behavior, if a rate-limiting group is so tight on bandwidth that you're
+ only willing to send 1 byte per tick per bufferevent, you might instead
+ want to batch up the reads and writes so that you send N bytes per
+ 1/N of the bufferevents (chosen at random) each tick, so you still wind
+ up send 1 byte per tick per bufferevent on average, but you don't send
+ so many tiny packets.
+
+ The default min-share is currently 64 bytes.
+
+ Returns 0 on success, -1 on failure.
+ */
+EVENT2_EXPORT_SYMBOL
+int bufferevent_rate_limit_group_set_min_share(
+ struct bufferevent_rate_limit_group *, size_t);
+
+/**
+ Free a rate-limiting group. The group must have no members when
+ this function is called.
+*/
+EVENT2_EXPORT_SYMBOL
+void bufferevent_rate_limit_group_free(struct bufferevent_rate_limit_group *);
+
+/**
+ Add 'bev' to the list of bufferevents whose aggregate reading and writing
+ is restricted by 'g'. If 'g' is NULL, remove 'bev' from its current group.
+
+ A bufferevent may belong to no more than one rate-limit group at a time.
+ If 'bev' is already a member of a group, it will be removed from its old
+ group before being added to 'g'.
+
+ Return 0 on success and -1 on failure.
+ */
+EVENT2_EXPORT_SYMBOL
+int bufferevent_add_to_rate_limit_group(struct bufferevent *bev,
+ struct bufferevent_rate_limit_group *g);
+
+/** Remove 'bev' from its current rate-limit group (if any). */
+EVENT2_EXPORT_SYMBOL
+int bufferevent_remove_from_rate_limit_group(struct bufferevent *bev);
+
+/**
+ Set the size limit for single read operation.
+
+ Set to 0 for a reasonable default.
+
+ Return 0 on success and -1 on failure.
+ */
+EVENT2_EXPORT_SYMBOL
+int bufferevent_set_max_single_read(struct bufferevent *bev, size_t size);
+
+/**
+ Set the size limit for single write operation.
+
+ Set to 0 for a reasonable default.
+
+ Return 0 on success and -1 on failure.
+ */
+EVENT2_EXPORT_SYMBOL
+int bufferevent_set_max_single_write(struct bufferevent *bev, size_t size);
+
+/** Get the current size limit for single read operation. */
+EVENT2_EXPORT_SYMBOL
+ev_ssize_t bufferevent_get_max_single_read(struct bufferevent *bev);
+
+/** Get the current size limit for single write operation. */
+EVENT2_EXPORT_SYMBOL
+ev_ssize_t bufferevent_get_max_single_write(struct bufferevent *bev);
+
+/**
+ @name Rate limit inspection
+
+ Return the current read or write bucket size for a bufferevent.
+ If it is not configured with a per-bufferevent ratelimit, return
+ EV_SSIZE_MAX. This function does not inspect the group limit, if any.
+ Note that it can return a negative value if the bufferevent has been
+ made to read or write more than its limit.
+
+ @{
+ */
+EVENT2_EXPORT_SYMBOL
+ev_ssize_t bufferevent_get_read_limit(struct bufferevent *bev);
+EVENT2_EXPORT_SYMBOL
+ev_ssize_t bufferevent_get_write_limit(struct bufferevent *bev);
+/*@}*/
+
+EVENT2_EXPORT_SYMBOL
+ev_ssize_t bufferevent_get_max_to_read(struct bufferevent *bev);
+EVENT2_EXPORT_SYMBOL
+ev_ssize_t bufferevent_get_max_to_write(struct bufferevent *bev);
+
+EVENT2_EXPORT_SYMBOL
+const struct ev_token_bucket_cfg *bufferevent_get_token_bucket_cfg(const struct bufferevent * bev);
+
+/**
+ @name Group Rate limit inspection
+
+ Return the read or write bucket size for a bufferevent rate limit
+ group. Note that it can return a negative value if bufferevents in
+ the group have been made to read or write more than their limits.
+
+ @{
+ */
+EVENT2_EXPORT_SYMBOL
+ev_ssize_t bufferevent_rate_limit_group_get_read_limit(
+ struct bufferevent_rate_limit_group *);
+EVENT2_EXPORT_SYMBOL
+ev_ssize_t bufferevent_rate_limit_group_get_write_limit(
+ struct bufferevent_rate_limit_group *);
+/*@}*/
+
+/**
+ @name Rate limit manipulation
+
+ Subtract a number of bytes from a bufferevent's read or write bucket.
+ The decrement value can be negative, if you want to manually refill
+ the bucket. If the change puts the bucket above or below zero, the
+ bufferevent will resume or suspend reading writing as appropriate.
+ These functions make no change in the buckets for the bufferevent's
+ group, if any.
+
+ Returns 0 on success, -1 on internal error.
+
+ @{
+ */
+EVENT2_EXPORT_SYMBOL
+int bufferevent_decrement_read_limit(struct bufferevent *bev, ev_ssize_t decr);
+EVENT2_EXPORT_SYMBOL
+int bufferevent_decrement_write_limit(struct bufferevent *bev, ev_ssize_t decr);
+/*@}*/
+
+/**
+ @name Group rate limit manipulation
+
+ Subtract a number of bytes from a bufferevent rate-limiting group's
+ read or write bucket. The decrement value can be negative, if you
+ want to manually refill the bucket. If the change puts the bucket
+ above or below zero, the bufferevents in the group will resume or
+ suspend reading writing as appropriate.
+
+ Returns 0 on success, -1 on internal error.
+
+ @{
+ */
+EVENT2_EXPORT_SYMBOL
+int bufferevent_rate_limit_group_decrement_read(
+ struct bufferevent_rate_limit_group *, ev_ssize_t);
+EVENT2_EXPORT_SYMBOL
+int bufferevent_rate_limit_group_decrement_write(
+ struct bufferevent_rate_limit_group *, ev_ssize_t);
+/*@}*/
+
+
+/**
+ * Inspect the total bytes read/written on a group.
+ *
+ * Set the variable pointed to by total_read_out to the total number of bytes
+ * ever read on grp, and the variable pointed to by total_written_out to the
+ * total number of bytes ever written on grp. */
+EVENT2_EXPORT_SYMBOL
+void bufferevent_rate_limit_group_get_totals(
+ struct bufferevent_rate_limit_group *grp,
+ ev_uint64_t *total_read_out, ev_uint64_t *total_written_out);
+
+/**
+ * Reset the total bytes read/written on a group.
+ *
+ * Reset the number of bytes read or written on grp as given by
+ * bufferevent_rate_limit_group_reset_totals(). */
+EVENT2_EXPORT_SYMBOL
+void
+bufferevent_rate_limit_group_reset_totals(
+ struct bufferevent_rate_limit_group *grp);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* EVENT2_BUFFEREVENT_H_INCLUDED_ */
diff --git a/libevent/include/event2/bufferevent_compat.h b/libevent/include/event2/bufferevent_compat.h
new file mode 100644
index 0000000..a5a3c72
--- /dev/null
+++ b/libevent/include/event2/bufferevent_compat.h
@@ -0,0 +1,104 @@
+/*
+ * Copyright (c) 2007-2012 Niels Provos, Nick Mathewson
+ * Copyright (c) 2000-2007 Niels Provos <provos@citi.umich.edu>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ * derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+#ifndef EVENT2_BUFFEREVENT_COMPAT_H_INCLUDED_
+#define EVENT2_BUFFEREVENT_COMPAT_H_INCLUDED_
+
+#include <event2/visibility.h>
+
+#define evbuffercb bufferevent_data_cb
+#define everrorcb bufferevent_event_cb
+
+/**
+ Create a new bufferevent for an fd.
+
+ This function is deprecated. Use bufferevent_socket_new and
+ bufferevent_set_callbacks instead.
+
+ Libevent provides an abstraction on top of the regular event callbacks.
+ This abstraction is called a buffered event. A buffered event provides
+ input and output buffers that get filled and drained automatically. The
+ user of a buffered event no longer deals directly with the I/O, but
+ instead is reading from input and writing to output buffers.
+
+ Once initialized, the bufferevent structure can be used repeatedly with
+ bufferevent_enable() and bufferevent_disable().
+
+ When read enabled the bufferevent will try to read from the file descriptor
+ and call the read callback. The write callback is executed whenever the
+ output buffer is drained below the write low watermark, which is 0 by
+ default.
+
+ If multiple bases are in use, bufferevent_base_set() must be called before
+ enabling the bufferevent for the first time.
+
+ @deprecated This function is deprecated because it uses the current
+ event base, and as such can be error prone for multithreaded programs.
+ Use bufferevent_socket_new() instead.
+
+ @param fd the file descriptor from which data is read and written to.
+ This file descriptor is not allowed to be a pipe(2).
+ @param readcb callback to invoke when there is data to be read, or NULL if
+ no callback is desired
+ @param writecb callback to invoke when the file descriptor is ready for
+ writing, or NULL if no callback is desired
+ @param errorcb callback to invoke when there is an error on the file
+ descriptor
+ @param cbarg an argument that will be supplied to each of the callbacks
+ (readcb, writecb, and errorcb)
+ @return a pointer to a newly allocated bufferevent struct, or NULL if an
+ error occurred
+ @see bufferevent_base_set(), bufferevent_free()
+ */
+EVENT2_EXPORT_SYMBOL
+struct bufferevent *bufferevent_new(evutil_socket_t fd,
+ evbuffercb readcb, evbuffercb writecb, everrorcb errorcb, void *cbarg);
+
+
+/**
+ Set the read and write timeout for a buffered event.
+
+ @param bufev the bufferevent to be modified
+ @param timeout_read the read timeout
+ @param timeout_write the write timeout
+ */
+EVENT2_EXPORT_SYMBOL
+void bufferevent_settimeout(struct bufferevent *bufev,
+ int timeout_read, int timeout_write);
+
+#define EVBUFFER_READ BEV_EVENT_READING
+#define EVBUFFER_WRITE BEV_EVENT_WRITING
+#define EVBUFFER_EOF BEV_EVENT_EOF
+#define EVBUFFER_ERROR BEV_EVENT_ERROR
+#define EVBUFFER_TIMEOUT BEV_EVENT_TIMEOUT
+
+/** macro for getting access to the input buffer of a bufferevent */
+#define EVBUFFER_INPUT(x) bufferevent_get_input(x)
+/** macro for getting access to the output buffer of a bufferevent */
+#define EVBUFFER_OUTPUT(x) bufferevent_get_output(x)
+
+#endif
diff --git a/libevent/include/event2/bufferevent_ssl.h b/libevent/include/event2/bufferevent_ssl.h
new file mode 100644
index 0000000..bf39b84
--- /dev/null
+++ b/libevent/include/event2/bufferevent_ssl.h
@@ -0,0 +1,134 @@
+/*
+ * Copyright (c) 2009-2012 Niels Provos and Nick Mathewson
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ * derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+#ifndef EVENT2_BUFFEREVENT_SSL_H_INCLUDED_
+#define EVENT2_BUFFEREVENT_SSL_H_INCLUDED_
+
+/** @file event2/bufferevent_ssl.h
+
+ OpenSSL support for bufferevents.
+ */
+#include <event2/visibility.h>
+#include <event2/event-config.h>
+#include <event2/bufferevent.h>
+#include <event2/util.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* This is what openssl's SSL objects are underneath. */
+struct ssl_st;
+
+/**
+ The state of an SSL object to be used when creating a new
+ SSL bufferevent.
+ */
+enum bufferevent_ssl_state {
+ BUFFEREVENT_SSL_OPEN = 0,
+ BUFFEREVENT_SSL_CONNECTING = 1,
+ BUFFEREVENT_SSL_ACCEPTING = 2
+};
+
+#if defined(EVENT__HAVE_OPENSSL) || defined(EVENT_IN_DOXYGEN_)
+/**
+ Create a new SSL bufferevent to send its data over another bufferevent.
+
+ @param base An event_base to use to detect reading and writing. It
+ must also be the base for the underlying bufferevent.
+ @param underlying A socket to use for this SSL
+ @param ssl A SSL* object from openssl.
+ @param state The current state of the SSL connection
+ @param options One or more bufferevent_options
+ @return A new bufferevent on success, or NULL on failure
+*/
+EVENT2_EXPORT_SYMBOL
+struct bufferevent *
+bufferevent_openssl_filter_new(struct event_base *base,
+ struct bufferevent *underlying,
+ struct ssl_st *ssl,
+ enum bufferevent_ssl_state state,
+ int options);
+
+/**
+ Create a new SSL bufferevent to send its data over an SSL * on a socket.
+
+ @param base An event_base to use to detect reading and writing
+ @param fd A socket to use for this SSL
+ @param ssl A SSL* object from openssl.
+ @param state The current state of the SSL connection
+ @param options One or more bufferevent_options
+ @return A new bufferevent on success, or NULL on failure.
+*/
+EVENT2_EXPORT_SYMBOL
+struct bufferevent *
+bufferevent_openssl_socket_new(struct event_base *base,
+ evutil_socket_t fd,
+ struct ssl_st *ssl,
+ enum bufferevent_ssl_state state,
+ int options);
+
+/** Control how to report dirty SSL shutdowns.
+
+ If the peer (or the network, or an attacker) closes the TCP
+ connection before closing the SSL channel, and the protocol is SSL >= v3,
+ this is a "dirty" shutdown. If allow_dirty_shutdown is 0 (default),
+ this is reported as BEV_EVENT_ERROR.
+
+ If instead allow_dirty_shutdown=1, a dirty shutdown is reported as
+ BEV_EVENT_EOF.
+
+ (Note that if the protocol is < SSLv3, you will always receive
+ BEV_EVENT_EOF, since SSL 2 and earlier cannot distinguish a secure
+ connection close from a dirty one. This is one reason (among many)
+ not to use SSL 2.)
+*/
+
+EVENT2_EXPORT_SYMBOL
+int bufferevent_openssl_get_allow_dirty_shutdown(struct bufferevent *bev);
+EVENT2_EXPORT_SYMBOL
+void bufferevent_openssl_set_allow_dirty_shutdown(struct bufferevent *bev,
+ int allow_dirty_shutdown);
+
+/** Return the underlying openssl SSL * object for an SSL bufferevent. */
+EVENT2_EXPORT_SYMBOL
+struct ssl_st *
+bufferevent_openssl_get_ssl(struct bufferevent *bufev);
+
+/** Tells a bufferevent to begin SSL renegotiation. */
+EVENT2_EXPORT_SYMBOL
+int bufferevent_ssl_renegotiate(struct bufferevent *bev);
+
+/** Return the most recent OpenSSL error reported on an SSL bufferevent. */
+EVENT2_EXPORT_SYMBOL
+unsigned long bufferevent_get_openssl_error(struct bufferevent *bev);
+
+#endif
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* EVENT2_BUFFEREVENT_SSL_H_INCLUDED_ */
diff --git a/libevent/include/event2/bufferevent_struct.h b/libevent/include/event2/bufferevent_struct.h
new file mode 100644
index 0000000..e84c082
--- /dev/null
+++ b/libevent/include/event2/bufferevent_struct.h
@@ -0,0 +1,116 @@
+/*
+ * Copyright (c) 2000-2007 Niels Provos <provos@citi.umich.edu>
+ * Copyright (c) 2007-2012 Niels Provos and Nick Mathewson
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ * derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+#ifndef EVENT2_BUFFEREVENT_STRUCT_H_INCLUDED_
+#define EVENT2_BUFFEREVENT_STRUCT_H_INCLUDED_
+
+/** @file event2/bufferevent_struct.h
+
+ Data structures for bufferevents. Using these structures may hurt forward
+ compatibility with later versions of Libevent: be careful!
+
+ @deprecated Use of bufferevent_struct.h is completely deprecated; these
+ structures are only exposed for backward compatibility with programs
+ written before Libevent 2.0 that used them.
+ */
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include <event2/event-config.h>
+#ifdef EVENT__HAVE_SYS_TYPES_H
+#include <sys/types.h>
+#endif
+#ifdef EVENT__HAVE_SYS_TIME_H
+#include <sys/time.h>
+#endif
+
+/* For int types. */
+#include <event2/util.h>
+/* For struct event */
+#include <event2/event_struct.h>
+
+struct event_watermark {
+ size_t low;
+ size_t high;
+};
+
+/**
+ Shared implementation of a bufferevent.
+
+ This type is exposed only because it was exposed in previous versions,
+ and some people's code may rely on manipulating it. Otherwise, you
+ should really not rely on the layout, size, or contents of this structure:
+ it is fairly volatile, and WILL change in future versions of the code.
+**/
+struct bufferevent {
+ /** Event base for which this bufferevent was created. */
+ struct event_base *ev_base;
+ /** Pointer to a table of function pointers to set up how this
+ bufferevent behaves. */
+ const struct bufferevent_ops *be_ops;
+
+ /** A read event that triggers when a timeout has happened or a socket
+ is ready to read data. Only used by some subtypes of
+ bufferevent. */
+ struct event ev_read;
+ /** A write event that triggers when a timeout has happened or a socket
+ is ready to write data. Only used by some subtypes of
+ bufferevent. */
+ struct event ev_write;
+
+ /** An input buffer. Only the bufferevent is allowed to add data to
+ this buffer, though the user is allowed to drain it. */
+ struct evbuffer *input;
+
+ /** An input buffer. Only the bufferevent is allowed to drain data
+ from this buffer, though the user is allowed to add it. */
+ struct evbuffer *output;
+
+ struct event_watermark wm_read;
+ struct event_watermark wm_write;
+
+ bufferevent_data_cb readcb;
+ bufferevent_data_cb writecb;
+ /* This should be called 'eventcb', but renaming it would break
+ * backward compatibility */
+ bufferevent_event_cb errorcb;
+ void *cbarg;
+
+ struct timeval timeout_read;
+ struct timeval timeout_write;
+
+ /** Events that are currently enabled: currently EV_READ and EV_WRITE
+ are supported. */
+ short enabled;
+};
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* EVENT2_BUFFEREVENT_STRUCT_H_INCLUDED_ */
diff --git a/libevent/include/event2/dns.h b/libevent/include/event2/dns.h
new file mode 100644
index 0000000..13ce027
--- /dev/null
+++ b/libevent/include/event2/dns.h
@@ -0,0 +1,751 @@
+/*
+ * Copyright (c) 2006-2007 Niels Provos <provos@citi.umich.edu>
+ * Copyright (c) 2007-2012 Niels Provos and Nick Mathewson
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ * derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/*
+ * The original DNS code is due to Adam Langley with heavy
+ * modifications by Nick Mathewson. Adam put his DNS software in the
+ * public domain. You can find his original copyright below. Please,
+ * aware that the code as part of Libevent is governed by the 3-clause
+ * BSD license above.
+ *
+ * This software is Public Domain. To view a copy of the public domain dedication,
+ * visit http://creativecommons.org/licenses/publicdomain/ or send a letter to
+ * Creative Commons, 559 Nathan Abbott Way, Stanford, California 94305, USA.
+ *
+ * I ask and expect, but do not require, that all derivative works contain an
+ * attribution similar to:
+ * Parts developed by Adam Langley <agl@imperialviolet.org>
+ *
+ * You may wish to replace the word "Parts" with something else depending on
+ * the amount of original code.
+ *
+ * (Derivative works does not include programs which link against, run or include
+ * the source verbatim in their source distributions)
+ */
+
+/** @file event2/dns.h
+ *
+ * Welcome, gentle reader
+ *
+ * Async DNS lookups are really a whole lot harder than they should be,
+ * mostly stemming from the fact that the libc resolver has never been
+ * very good at them. Before you use this library you should see if libc
+ * can do the job for you with the modern async call getaddrinfo_a
+ * (see http://www.imperialviolet.org/page25.html#e498). Otherwise,
+ * please continue.
+ *
+ * The library keeps track of the state of nameservers and will avoid
+ * them when they go down. Otherwise it will round robin between them.
+ *
+ * Quick start guide:
+ * #include "evdns.h"
+ * void callback(int result, char type, int count, int ttl,
+ * void *addresses, void *arg);
+ * evdns_resolv_conf_parse(DNS_OPTIONS_ALL, "/etc/resolv.conf");
+ * evdns_resolve("www.hostname.com", 0, callback, NULL);
+ *
+ * When the lookup is complete the callback function is called. The
+ * first argument will be one of the DNS_ERR_* defines in evdns.h.
+ * Hopefully it will be DNS_ERR_NONE, in which case type will be
+ * DNS_IPv4_A, count will be the number of IP addresses, ttl is the time
+ * which the data can be cached for (in seconds), addresses will point
+ * to an array of uint32_t's and arg will be whatever you passed to
+ * evdns_resolve.
+ *
+ * Searching:
+ *
+ * In order for this library to be a good replacement for glibc's resolver it
+ * supports searching. This involves setting a list of default domains, in
+ * which names will be queried for. The number of dots in the query name
+ * determines the order in which this list is used.
+ *
+ * Searching appears to be a single lookup from the point of view of the API,
+ * although many DNS queries may be generated from a single call to
+ * evdns_resolve. Searching can also drastically slow down the resolution
+ * of names.
+ *
+ * To disable searching:
+ * 1. Never set it up. If you never call evdns_resolv_conf_parse or
+ * evdns_search_add then no searching will occur.
+ *
+ * 2. If you do call evdns_resolv_conf_parse then don't pass
+ * DNS_OPTION_SEARCH (or DNS_OPTIONS_ALL, which implies it).
+ *
+ * 3. When calling evdns_resolve, pass the DNS_QUERY_NO_SEARCH flag.
+ *
+ * The order of searches depends on the number of dots in the name. If the
+ * number is greater than the ndots setting then the names is first tried
+ * globally. Otherwise each search domain is appended in turn.
+ *
+ * The ndots setting can either be set from a resolv.conf, or by calling
+ * evdns_search_ndots_set.
+ *
+ * For example, with ndots set to 1 (the default) and a search domain list of
+ * ["myhome.net"]:
+ * Query: www
+ * Order: www.myhome.net, www.
+ *
+ * Query: www.abc
+ * Order: www.abc., www.abc.myhome.net
+ *
+ * Internals:
+ *
+ * Requests are kept in two queues. The first is the inflight queue. In
+ * this queue requests have an allocated transaction id and nameserver.
+ * They will soon be transmitted if they haven't already been.
+ *
+ * The second is the waiting queue. The size of the inflight ring is
+ * limited and all other requests wait in waiting queue for space. This
+ * bounds the number of concurrent requests so that we don't flood the
+ * nameserver. Several algorithms require a full walk of the inflight
+ * queue and so bounding its size keeps thing going nicely under huge
+ * (many thousands of requests) loads.
+ *
+ * If a nameserver loses too many requests it is considered down and we
+ * try not to use it. After a while we send a probe to that nameserver
+ * (a lookup for google.com) and, if it replies, we consider it working
+ * again. If the nameserver fails a probe we wait longer to try again
+ * with the next probe.
+ */
+
+#ifndef EVENT2_DNS_H_INCLUDED_
+#define EVENT2_DNS_H_INCLUDED_
+
+#include <event2/visibility.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* For integer types. */
+#include <event2/util.h>
+
+/** Error codes 0-5 are as described in RFC 1035. */
+#define DNS_ERR_NONE 0
+/** The name server was unable to interpret the query */
+#define DNS_ERR_FORMAT 1
+/** The name server was unable to process this query due to a problem with the
+ * name server */
+#define DNS_ERR_SERVERFAILED 2
+/** The domain name does not exist */
+#define DNS_ERR_NOTEXIST 3
+/** The name server does not support the requested kind of query */
+#define DNS_ERR_NOTIMPL 4
+/** The name server refuses to reform the specified operation for policy
+ * reasons */
+#define DNS_ERR_REFUSED 5
+/** The reply was truncated or ill-formatted */
+#define DNS_ERR_TRUNCATED 65
+/** An unknown error occurred */
+#define DNS_ERR_UNKNOWN 66
+/** Communication with the server timed out */
+#define DNS_ERR_TIMEOUT 67
+/** The request was canceled because the DNS subsystem was shut down. */
+#define DNS_ERR_SHUTDOWN 68
+/** The request was canceled via a call to evdns_cancel_request */
+#define DNS_ERR_CANCEL 69
+/** There were no answers and no error condition in the DNS packet.
+ * This can happen when you ask for an address that exists, but a record
+ * type that doesn't. */
+#define DNS_ERR_NODATA 70
+
+#define DNS_IPv4_A 1
+#define DNS_PTR 2
+#define DNS_IPv6_AAAA 3
+
+#define DNS_QUERY_NO_SEARCH 1
+
+/* Allow searching */
+#define DNS_OPTION_SEARCH 1
+/* Parse "nameserver" and add default if no such section */
+#define DNS_OPTION_NAMESERVERS 2
+/* Parse additional options like:
+ * - timeout:
+ * - getaddrinfo-allow-skew:
+ * - max-timeouts:
+ * - max-inflight:
+ * - attempts:
+ * - randomize-case:
+ * - initial-probe-timeout:
+ */
+#define DNS_OPTION_MISC 4
+/* Load hosts file (i.e. "/etc/hosts") */
+#define DNS_OPTION_HOSTSFILE 8
+/**
+ * All above:
+ * - DNS_OPTION_SEARCH
+ * - DNS_OPTION_NAMESERVERS
+ * - DNS_OPTION_MISC
+ * - DNS_OPTION_HOSTSFILE
+ */
+#define DNS_OPTIONS_ALL ( \
+ DNS_OPTION_SEARCH | \
+ DNS_OPTION_NAMESERVERS | \
+ DNS_OPTION_MISC | \
+ DNS_OPTION_HOSTSFILE | \
+ 0 \
+)
+/* Do not "default" nameserver (i.e. "127.0.0.1:53") if there is no nameservers
+ * in resolv.conf, (iff DNS_OPTION_NAMESERVERS is set) */
+#define DNS_OPTION_NAMESERVERS_NO_DEFAULT 16
+
+/* Obsolete name for DNS_QUERY_NO_SEARCH */
+#define DNS_NO_SEARCH DNS_QUERY_NO_SEARCH
+
+/**
+ * The callback that contains the results from a lookup.
+ * - result is one of the DNS_ERR_* values (DNS_ERR_NONE for success)
+ * - type is either DNS_IPv4_A or DNS_PTR or DNS_IPv6_AAAA
+ * - count contains the number of addresses of form type
+ * - ttl is the number of seconds the resolution may be cached for.
+ * - addresses needs to be cast according to type. It will be an array of
+ * 4-byte sequences for ipv4, or an array of 16-byte sequences for ipv6,
+ * or a nul-terminated string for PTR.
+ */
+typedef void (*evdns_callback_type) (int result, char type, int count, int ttl, void *addresses, void *arg);
+
+struct evdns_base;
+struct event_base;
+
+/** Flag for evdns_base_new: process resolv.conf. */
+#define EVDNS_BASE_INITIALIZE_NAMESERVERS 1
+/** Flag for evdns_base_new: Do not prevent the libevent event loop from
+ * exiting when we have no active dns requests. */
+#define EVDNS_BASE_DISABLE_WHEN_INACTIVE 0x8000
+/** Flag for evdns_base_new: If EVDNS_BASE_INITIALIZE_NAMESERVERS isset, do not
+ * add default nameserver if there are no nameservers in resolv.conf
+ * @see DNS_OPTION_NAMESERVERS_NO_DEFAULT */
+#define EVDNS_BASE_NAMESERVERS_NO_DEFAULT 0x10000
+
+/**
+ Initialize the asynchronous DNS library.
+
+ This function initializes support for non-blocking name resolution by
+ calling evdns_resolv_conf_parse() on UNIX and
+ evdns_config_windows_nameservers() on Windows.
+
+ @param event_base the event base to associate the dns client with
+ @param flags any of EVDNS_BASE_INITIALIZE_NAMESERVERS|
+ EVDNS_BASE_DISABLE_WHEN_INACTIVE|EVDNS_BASE_NAMESERVERS_NO_DEFAULT
+ @return evdns_base object if successful, or NULL if an error occurred.
+ @see evdns_base_free()
+ */
+EVENT2_EXPORT_SYMBOL
+struct evdns_base * evdns_base_new(struct event_base *event_base, int initialize_nameservers);
+
+
+/**
+ Shut down the asynchronous DNS resolver and terminate all active requests.
+
+ If the 'fail_requests' option is enabled, all active requests will return
+ an empty result with the error flag set to DNS_ERR_SHUTDOWN. Otherwise,
+ the requests will be silently discarded.
+
+ @param evdns_base the evdns base to free
+ @param fail_requests if zero, active requests will be aborted; if non-zero,
+ active requests will return DNS_ERR_SHUTDOWN.
+ @see evdns_base_new()
+ */
+EVENT2_EXPORT_SYMBOL
+void evdns_base_free(struct evdns_base *base, int fail_requests);
+
+/**
+ Remove all hosts entries that have been loaded into the event_base via
+ evdns_base_load_hosts or via event_base_resolv_conf_parse.
+
+ @param evdns_base the evdns base to remove outdated host addresses from
+ */
+EVENT2_EXPORT_SYMBOL
+void evdns_base_clear_host_addresses(struct evdns_base *base);
+
+/**
+ Convert a DNS error code to a string.
+
+ @param err the DNS error code
+ @return a string containing an explanation of the error code
+*/
+EVENT2_EXPORT_SYMBOL
+const char *evdns_err_to_string(int err);
+
+
+/**
+ Add a nameserver.
+
+ The address should be an IPv4 address in network byte order.
+ The type of address is chosen so that it matches in_addr.s_addr.
+
+ @param base the evdns_base to which to add the name server
+ @param address an IP address in network byte order
+ @return 0 if successful, or -1 if an error occurred
+ @see evdns_base_nameserver_ip_add()
+ */
+EVENT2_EXPORT_SYMBOL
+int evdns_base_nameserver_add(struct evdns_base *base,
+ unsigned long int address);
+
+/**
+ Get the number of configured nameservers.
+
+ This returns the number of configured nameservers (not necessarily the
+ number of running nameservers). This is useful for double-checking
+ whether our calls to the various nameserver configuration functions
+ have been successful.
+
+ @param base the evdns_base to which to apply this operation
+ @return the number of configured nameservers
+ @see evdns_base_nameserver_add()
+ */
+EVENT2_EXPORT_SYMBOL
+int evdns_base_count_nameservers(struct evdns_base *base);
+
+/**
+ Remove all configured nameservers, and suspend all pending resolves.
+
+ Resolves will not necessarily be re-attempted until evdns_base_resume() is called.
+
+ @param base the evdns_base to which to apply this operation
+ @return 0 if successful, or -1 if an error occurred
+ @see evdns_base_resume()
+ */
+EVENT2_EXPORT_SYMBOL
+int evdns_base_clear_nameservers_and_suspend(struct evdns_base *base);
+
+
+/**
+ Resume normal operation and continue any suspended resolve requests.
+
+ Re-attempt resolves left in limbo after an earlier call to
+ evdns_base_clear_nameservers_and_suspend().
+
+ @param base the evdns_base to which to apply this operation
+ @return 0 if successful, or -1 if an error occurred
+ @see evdns_base_clear_nameservers_and_suspend()
+ */
+EVENT2_EXPORT_SYMBOL
+int evdns_base_resume(struct evdns_base *base);
+
+/**
+ Add a nameserver by string address.
+
+ This function parses a n IPv4 or IPv6 address from a string and adds it as a
+ nameserver. It supports the following formats:
+ - [IPv6Address]:port
+ - [IPv6Address]
+ - IPv6Address
+ - IPv4Address:port
+ - IPv4Address
+
+ If no port is specified, it defaults to 53.
+
+ @param base the evdns_base to which to apply this operation
+ @return 0 if successful, or -1 if an error occurred
+ @see evdns_base_nameserver_add()
+ */
+EVENT2_EXPORT_SYMBOL
+int evdns_base_nameserver_ip_add(struct evdns_base *base,
+ const char *ip_as_string);
+
+/**
+ Add a nameserver by sockaddr.
+ **/
+EVENT2_EXPORT_SYMBOL
+int
+evdns_base_nameserver_sockaddr_add(struct evdns_base *base,
+ const struct sockaddr *sa, ev_socklen_t len, unsigned flags);
+
+struct evdns_request;
+
+/**
+ Lookup an A record for a given name.
+
+ @param base the evdns_base to which to apply this operation
+ @param name a DNS hostname
+ @param flags either 0, or DNS_QUERY_NO_SEARCH to disable searching for this query.
+ @param callback a callback function to invoke when the request is completed
+ @param ptr an argument to pass to the callback function
+ @return an evdns_request object if successful, or NULL if an error occurred.
+ @see evdns_resolve_ipv6(), evdns_resolve_reverse(), evdns_resolve_reverse_ipv6(), evdns_cancel_request()
+ */
+EVENT2_EXPORT_SYMBOL
+struct evdns_request *evdns_base_resolve_ipv4(struct evdns_base *base, const char *name, int flags, evdns_callback_type callback, void *ptr);
+
+/**
+ Lookup an AAAA record for a given name.
+
+ @param base the evdns_base to which to apply this operation
+ @param name a DNS hostname
+ @param flags either 0, or DNS_QUERY_NO_SEARCH to disable searching for this query.
+ @param callback a callback function to invoke when the request is completed
+ @param ptr an argument to pass to the callback function
+ @return an evdns_request object if successful, or NULL if an error occurred.
+ @see evdns_resolve_ipv4(), evdns_resolve_reverse(), evdns_resolve_reverse_ipv6(), evdns_cancel_request()
+ */
+EVENT2_EXPORT_SYMBOL
+struct evdns_request *evdns_base_resolve_ipv6(struct evdns_base *base, const char *name, int flags, evdns_callback_type callback, void *ptr);
+
+struct in_addr;
+struct in6_addr;
+
+/**
+ Lookup a PTR record for a given IP address.
+
+ @param base the evdns_base to which to apply this operation
+ @param in an IPv4 address
+ @param flags either 0, or DNS_QUERY_NO_SEARCH to disable searching for this query.
+ @param callback a callback function to invoke when the request is completed
+ @param ptr an argument to pass to the callback function
+ @return an evdns_request object if successful, or NULL if an error occurred.
+ @see evdns_resolve_reverse_ipv6(), evdns_cancel_request()
+ */
+EVENT2_EXPORT_SYMBOL
+struct evdns_request *evdns_base_resolve_reverse(struct evdns_base *base, const struct in_addr *in, int flags, evdns_callback_type callback, void *ptr);
+
+
+/**
+ Lookup a PTR record for a given IPv6 address.
+
+ @param base the evdns_base to which to apply this operation
+ @param in an IPv6 address
+ @param flags either 0, or DNS_QUERY_NO_SEARCH to disable searching for this query.
+ @param callback a callback function to invoke when the request is completed
+ @param ptr an argument to pass to the callback function
+ @return an evdns_request object if successful, or NULL if an error occurred.
+ @see evdns_resolve_reverse_ipv6(), evdns_cancel_request()
+ */
+EVENT2_EXPORT_SYMBOL
+struct evdns_request *evdns_base_resolve_reverse_ipv6(struct evdns_base *base, const struct in6_addr *in, int flags, evdns_callback_type callback, void *ptr);
+
+/**
+ Cancels a pending DNS resolution request.
+
+ @param base the evdns_base that was used to make the request
+ @param req the evdns_request that was returned by calling a resolve function
+ @see evdns_base_resolve_ipv4(), evdns_base_resolve_ipv6, evdns_base_resolve_reverse
+*/
+EVENT2_EXPORT_SYMBOL
+void evdns_cancel_request(struct evdns_base *base, struct evdns_request *req);
+
+/**
+ Set the value of a configuration option.
+
+ The currently available configuration options are:
+
+ ndots, timeout, max-timeouts, max-inflight, attempts, randomize-case,
+ bind-to, initial-probe-timeout, getaddrinfo-allow-skew,
+ so-rcvbuf, so-sndbuf.
+
+ In versions before Libevent 2.0.3-alpha, the option name needed to end with
+ a colon.
+
+ @param base the evdns_base to which to apply this operation
+ @param option the name of the configuration option to be modified
+ @param val the value to be set
+ @return 0 if successful, or -1 if an error occurred
+ */
+EVENT2_EXPORT_SYMBOL
+int evdns_base_set_option(struct evdns_base *base, const char *option, const char *val);
+
+
+/**
+ Parse a resolv.conf file.
+
+ The 'flags' parameter determines what information is parsed from the
+ resolv.conf file. See the man page for resolv.conf for the format of this
+ file.
+
+ The following directives are not parsed from the file: sortlist, rotate,
+ no-check-names, inet6, debug.
+
+ If this function encounters an error, the possible return values are: 1 =
+ failed to open file, 2 = failed to stat file, 3 = file too large, 4 = out of
+ memory, 5 = short read from file, 6 = no nameservers listed in the file
+
+ @param base the evdns_base to which to apply this operation
+ @param flags any of DNS_OPTION_NAMESERVERS|DNS_OPTION_SEARCH|DNS_OPTION_MISC|
+ DNS_OPTION_HOSTSFILE|DNS_OPTIONS_ALL|DNS_OPTION_NAMESERVERS_NO_DEFAULT
+ @param filename the path to the resolv.conf file
+ @return 0 if successful, or various positive error codes if an error
+ occurred (see above)
+ @see resolv.conf(3), evdns_config_windows_nameservers()
+ */
+EVENT2_EXPORT_SYMBOL
+int evdns_base_resolv_conf_parse(struct evdns_base *base, int flags, const char *const filename);
+
+/**
+ Load an /etc/hosts-style file from 'hosts_fname' into 'base'.
+
+ If hosts_fname is NULL, add minimal entries for localhost, and nothing
+ else.
+
+ Note that only evdns_getaddrinfo uses the /etc/hosts entries.
+
+ This function does not replace previously loaded hosts entries; to do that,
+ call evdns_base_clear_host_addresses first.
+
+ Return 0 on success, negative on failure.
+*/
+EVENT2_EXPORT_SYMBOL
+int evdns_base_load_hosts(struct evdns_base *base, const char *hosts_fname);
+
+#if defined(EVENT_IN_DOXYGEN_) || defined(_WIN32)
+/**
+ Obtain nameserver information using the Windows API.
+
+ Attempt to configure a set of nameservers based on platform settings on
+ a win32 host. Preferentially tries to use GetNetworkParams; if that fails,
+ looks in the registry.
+
+ @return 0 if successful, or -1 if an error occurred
+ @see evdns_resolv_conf_parse()
+ */
+EVENT2_EXPORT_SYMBOL
+int evdns_base_config_windows_nameservers(struct evdns_base *);
+#define EVDNS_BASE_CONFIG_WINDOWS_NAMESERVERS_IMPLEMENTED
+#endif
+
+
+/**
+ Clear the list of search domains.
+ */
+EVENT2_EXPORT_SYMBOL
+void evdns_base_search_clear(struct evdns_base *base);
+
+
+/**
+ Add a domain to the list of search domains
+
+ @param domain the domain to be added to the search list
+ */
+EVENT2_EXPORT_SYMBOL
+void evdns_base_search_add(struct evdns_base *base, const char *domain);
+
+
+/**
+ Set the 'ndots' parameter for searches.
+
+ Sets the number of dots which, when found in a name, causes
+ the first query to be without any search domain.
+
+ @param ndots the new ndots parameter
+ */
+EVENT2_EXPORT_SYMBOL
+void evdns_base_search_ndots_set(struct evdns_base *base, const int ndots);
+
+/**
+ A callback that is invoked when a log message is generated
+
+ @param is_warning indicates if the log message is a 'warning'
+ @param msg the content of the log message
+ */
+typedef void (*evdns_debug_log_fn_type)(int is_warning, const char *msg);
+
+
+/**
+ Set the callback function to handle DNS log messages. If this
+ callback is not set, evdns log messages are handled with the regular
+ Libevent logging system.
+
+ @param fn the callback to be invoked when a log message is generated
+ */
+EVENT2_EXPORT_SYMBOL
+void evdns_set_log_fn(evdns_debug_log_fn_type fn);
+
+/**
+ Set a callback that will be invoked to generate transaction IDs. By
+ default, we pick transaction IDs based on the current clock time, which
+ is bad for security.
+
+ @param fn the new callback, or NULL to use the default.
+
+ NOTE: This function has no effect in Libevent 2.0.4-alpha and later,
+ since Libevent now provides its own secure RNG.
+ */
+EVENT2_EXPORT_SYMBOL
+void evdns_set_transaction_id_fn(ev_uint16_t (*fn)(void));
+
+/**
+ Set a callback used to generate random bytes. By default, we use
+ the same function as passed to evdns_set_transaction_id_fn to generate
+ bytes two at a time. If a function is provided here, it's also used
+ to generate transaction IDs.
+
+ NOTE: This function has no effect in Libevent 2.0.4-alpha and later,
+ since Libevent now provides its own secure RNG.
+*/
+EVENT2_EXPORT_SYMBOL
+void evdns_set_random_bytes_fn(void (*fn)(char *, size_t));
+
+/*
+ * Functions used to implement a DNS server.
+ */
+
+struct evdns_server_request;
+struct evdns_server_question;
+
+/**
+ A callback to implement a DNS server. The callback function receives a DNS
+ request. It should then optionally add a number of answers to the reply
+ using the evdns_server_request_add_*_reply functions, before calling either
+ evdns_server_request_respond to send the reply back, or
+ evdns_server_request_drop to decline to answer the request.
+
+ @param req A newly received request
+ @param user_data A pointer that was passed to
+ evdns_add_server_port_with_base().
+ */
+typedef void (*evdns_request_callback_fn_type)(struct evdns_server_request *, void *);
+#define EVDNS_ANSWER_SECTION 0
+#define EVDNS_AUTHORITY_SECTION 1
+#define EVDNS_ADDITIONAL_SECTION 2
+
+#define EVDNS_TYPE_A 1
+#define EVDNS_TYPE_NS 2
+#define EVDNS_TYPE_CNAME 5
+#define EVDNS_TYPE_SOA 6
+#define EVDNS_TYPE_PTR 12
+#define EVDNS_TYPE_MX 15
+#define EVDNS_TYPE_TXT 16
+#define EVDNS_TYPE_AAAA 28
+
+#define EVDNS_QTYPE_AXFR 252
+#define EVDNS_QTYPE_ALL 255
+
+#define EVDNS_CLASS_INET 1
+
+/* flags that can be set in answers; as part of the err parameter */
+#define EVDNS_FLAGS_AA 0x400
+#define EVDNS_FLAGS_RD 0x080
+
+/** Create a new DNS server port.
+
+ @param base The event base to handle events for the server port.
+ @param socket A UDP socket to accept DNS requests.
+ @param flags Always 0 for now.
+ @param callback A function to invoke whenever we get a DNS request
+ on the socket.
+ @param user_data Data to pass to the callback.
+ @return an evdns_server_port structure for this server port or NULL if
+ an error occurred.
+ */
+EVENT2_EXPORT_SYMBOL
+struct evdns_server_port *evdns_add_server_port_with_base(struct event_base *base, evutil_socket_t socket, int flags, evdns_request_callback_fn_type callback, void *user_data);
+/** Close down a DNS server port, and free associated structures. */
+EVENT2_EXPORT_SYMBOL
+void evdns_close_server_port(struct evdns_server_port *port);
+
+/** Sets some flags in a reply we're building.
+ Allows setting of the AA or RD flags
+ */
+EVENT2_EXPORT_SYMBOL
+void evdns_server_request_set_flags(struct evdns_server_request *req, int flags);
+
+/* Functions to add an answer to an in-progress DNS reply.
+ */
+EVENT2_EXPORT_SYMBOL
+int evdns_server_request_add_reply(struct evdns_server_request *req, int section, const char *name, int type, int dns_class, int ttl, int datalen, int is_name, const char *data);
+EVENT2_EXPORT_SYMBOL
+int evdns_server_request_add_a_reply(struct evdns_server_request *req, const char *name, int n, const void *addrs, int ttl);
+EVENT2_EXPORT_SYMBOL
+int evdns_server_request_add_aaaa_reply(struct evdns_server_request *req, const char *name, int n, const void *addrs, int ttl);
+EVENT2_EXPORT_SYMBOL
+int evdns_server_request_add_ptr_reply(struct evdns_server_request *req, struct in_addr *in, const char *inaddr_name, const char *hostname, int ttl);
+EVENT2_EXPORT_SYMBOL
+int evdns_server_request_add_cname_reply(struct evdns_server_request *req, const char *name, const char *cname, int ttl);
+
+/**
+ Send back a response to a DNS request, and free the request structure.
+*/
+EVENT2_EXPORT_SYMBOL
+int evdns_server_request_respond(struct evdns_server_request *req, int err);
+/**
+ Free a DNS request without sending back a reply.
+*/
+EVENT2_EXPORT_SYMBOL
+int evdns_server_request_drop(struct evdns_server_request *req);
+struct sockaddr;
+/**
+ Get the address that made a DNS request.
+ */
+EVENT2_EXPORT_SYMBOL
+int evdns_server_request_get_requesting_addr(struct evdns_server_request *req, struct sockaddr *sa, int addr_len);
+
+/** Callback for evdns_getaddrinfo. */
+typedef void (*evdns_getaddrinfo_cb)(int result, struct evutil_addrinfo *res, void *arg);
+
+struct evdns_base;
+struct evdns_getaddrinfo_request;
+/** Make a non-blocking getaddrinfo request using the dns_base in 'dns_base'.
+ *
+ * If we can answer the request immediately (with an error or not!), then we
+ * invoke cb immediately and return NULL. Otherwise we return
+ * an evdns_getaddrinfo_request and invoke cb later.
+ *
+ * When the callback is invoked, we pass as its first argument the error code
+ * that getaddrinfo would return (or 0 for no error). As its second argument,
+ * we pass the evutil_addrinfo structures we found (or NULL on error). We
+ * pass 'arg' as the third argument.
+ *
+ * Limitations:
+ *
+ * - The AI_V4MAPPED and AI_ALL flags are not currently implemented.
+ * - For ai_socktype, we only handle SOCKTYPE_STREAM, SOCKTYPE_UDP, and 0.
+ * - For ai_protocol, we only handle IPPROTO_TCP, IPPROTO_UDP, and 0.
+ */
+EVENT2_EXPORT_SYMBOL
+struct evdns_getaddrinfo_request *evdns_getaddrinfo(
+ struct evdns_base *dns_base,
+ const char *nodename, const char *servname,
+ const struct evutil_addrinfo *hints_in,
+ evdns_getaddrinfo_cb cb, void *arg);
+
+/* Cancel an in-progress evdns_getaddrinfo. This MUST NOT be called after the
+ * getaddrinfo's callback has been invoked. The resolves will be canceled,
+ * and the callback will be invoked with the error EVUTIL_EAI_CANCEL. */
+EVENT2_EXPORT_SYMBOL
+void evdns_getaddrinfo_cancel(struct evdns_getaddrinfo_request *req);
+
+/**
+ Retrieve the address of the 'idx'th configured nameserver.
+
+ @param base The evdns_base to examine.
+ @param idx The index of the nameserver to get the address of.
+ @param sa A location to receive the server's address.
+ @param len The number of bytes available at sa.
+
+ @return the number of bytes written into sa on success. On failure, returns
+ -1 if idx is greater than the number of configured nameservers, or a
+ value greater than 'len' if len was not high enough.
+ */
+EVENT2_EXPORT_SYMBOL
+int evdns_base_get_nameserver_addr(struct evdns_base *base, int idx,
+ struct sockaddr *sa, ev_socklen_t len);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* !EVENT2_DNS_H_INCLUDED_ */
diff --git a/libevent/include/event2/dns_compat.h b/libevent/include/event2/dns_compat.h
new file mode 100644
index 0000000..a58c4b2
--- /dev/null
+++ b/libevent/include/event2/dns_compat.h
@@ -0,0 +1,358 @@
+/*
+ * Copyright (c) 2006-2007 Niels Provos <provos@citi.umich.edu>
+ * Copyright (c) 2007-2012 Niels Provos and Nick Mathewson
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ * derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+#ifndef EVENT2_DNS_COMPAT_H_INCLUDED_
+#define EVENT2_DNS_COMPAT_H_INCLUDED_
+
+/** @file event2/dns_compat.h
+
+ Potentially non-threadsafe versions of the functions in dns.h: provided
+ only for backwards compatibility.
+
+
+ */
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include <event2/event-config.h>
+#ifdef EVENT__HAVE_SYS_TYPES_H
+#include <sys/types.h>
+#endif
+#ifdef EVENT__HAVE_SYS_TIME_H
+#include <sys/time.h>
+#endif
+
+/* For int types. */
+#include <event2/util.h>
+#include <event2/visibility.h>
+
+/**
+ Initialize the asynchronous DNS library.
+
+ This function initializes support for non-blocking name resolution by
+ calling evdns_resolv_conf_parse() on UNIX and
+ evdns_config_windows_nameservers() on Windows.
+
+ @deprecated This function is deprecated because it always uses the current
+ event base, and is easily confused by multiple calls to event_init(), and
+ so is not safe for multithreaded use. Additionally, it allocates a global
+ structure that only one thread can use. The replacement is
+ evdns_base_new().
+
+ @return 0 if successful, or -1 if an error occurred
+ @see evdns_shutdown()
+ */
+EVENT2_EXPORT_SYMBOL
+int evdns_init(void);
+
+struct evdns_base;
+/**
+ Return the global evdns_base created by event_init() and used by the other
+ deprecated functions.
+
+ @deprecated This function is deprecated because use of the global
+ evdns_base is error-prone.
+ */
+EVENT2_EXPORT_SYMBOL
+struct evdns_base *evdns_get_global_base(void);
+
+/**
+ Shut down the asynchronous DNS resolver and terminate all active requests.
+
+ If the 'fail_requests' option is enabled, all active requests will return
+ an empty result with the error flag set to DNS_ERR_SHUTDOWN. Otherwise,
+ the requests will be silently discarded.
+
+ @deprecated This function is deprecated because it does not allow the
+ caller to specify which evdns_base it applies to. The recommended
+ function is evdns_base_shutdown().
+
+ @param fail_requests if zero, active requests will be aborted; if non-zero,
+ active requests will return DNS_ERR_SHUTDOWN.
+ @see evdns_init()
+ */
+EVENT2_EXPORT_SYMBOL
+void evdns_shutdown(int fail_requests);
+
+/**
+ Add a nameserver.
+
+ The address should be an IPv4 address in network byte order.
+ The type of address is chosen so that it matches in_addr.s_addr.
+
+ @deprecated This function is deprecated because it does not allow the
+ caller to specify which evdns_base it applies to. The recommended
+ function is evdns_base_nameserver_add().
+
+ @param address an IP address in network byte order
+ @return 0 if successful, or -1 if an error occurred
+ @see evdns_nameserver_ip_add()
+ */
+EVENT2_EXPORT_SYMBOL
+int evdns_nameserver_add(unsigned long int address);
+
+/**
+ Get the number of configured nameservers.
+
+ This returns the number of configured nameservers (not necessarily the
+ number of running nameservers). This is useful for double-checking
+ whether our calls to the various nameserver configuration functions
+ have been successful.
+
+ @deprecated This function is deprecated because it does not allow the
+ caller to specify which evdns_base it applies to. The recommended
+ function is evdns_base_count_nameservers().
+
+ @return the number of configured nameservers
+ @see evdns_nameserver_add()
+ */
+EVENT2_EXPORT_SYMBOL
+int evdns_count_nameservers(void);
+
+/**
+ Remove all configured nameservers, and suspend all pending resolves.
+
+ Resolves will not necessarily be re-attempted until evdns_resume() is called.
+
+ @deprecated This function is deprecated because it does not allow the
+ caller to specify which evdns_base it applies to. The recommended
+ function is evdns_base_clear_nameservers_and_suspend().
+
+ @return 0 if successful, or -1 if an error occurred
+ @see evdns_resume()
+ */
+EVENT2_EXPORT_SYMBOL
+int evdns_clear_nameservers_and_suspend(void);
+
+/**
+ Resume normal operation and continue any suspended resolve requests.
+
+ Re-attempt resolves left in limbo after an earlier call to
+ evdns_clear_nameservers_and_suspend().
+
+ @deprecated This function is deprecated because it does not allow the
+ caller to specify which evdns_base it applies to. The recommended
+ function is evdns_base_resume().
+
+ @return 0 if successful, or -1 if an error occurred
+ @see evdns_clear_nameservers_and_suspend()
+ */
+EVENT2_EXPORT_SYMBOL
+int evdns_resume(void);
+
+/**
+ Add a nameserver.
+
+ This wraps the evdns_nameserver_add() function by parsing a string as an IP
+ address and adds it as a nameserver.
+
+ @deprecated This function is deprecated because it does not allow the
+ caller to specify which evdns_base it applies to. The recommended
+ function is evdns_base_nameserver_ip_add().
+
+ @return 0 if successful, or -1 if an error occurred
+ @see evdns_nameserver_add()
+ */
+EVENT2_EXPORT_SYMBOL
+int evdns_nameserver_ip_add(const char *ip_as_string);
+
+/**
+ Lookup an A record for a given name.
+
+ @deprecated This function is deprecated because it does not allow the
+ caller to specify which evdns_base it applies to. The recommended
+ function is evdns_base_resolve_ipv4().
+
+ @param name a DNS hostname
+ @param flags either 0, or DNS_QUERY_NO_SEARCH to disable searching for this query.
+ @param callback a callback function to invoke when the request is completed
+ @param ptr an argument to pass to the callback function
+ @return 0 if successful, or -1 if an error occurred
+ @see evdns_resolve_ipv6(), evdns_resolve_reverse(), evdns_resolve_reverse_ipv6()
+ */
+EVENT2_EXPORT_SYMBOL
+int evdns_resolve_ipv4(const char *name, int flags, evdns_callback_type callback, void *ptr);
+
+/**
+ Lookup an AAAA record for a given name.
+
+ @param name a DNS hostname
+ @param flags either 0, or DNS_QUERY_NO_SEARCH to disable searching for this query.
+ @param callback a callback function to invoke when the request is completed
+ @param ptr an argument to pass to the callback function
+ @return 0 if successful, or -1 if an error occurred
+ @see evdns_resolve_ipv4(), evdns_resolve_reverse(), evdns_resolve_reverse_ipv6()
+ */
+EVENT2_EXPORT_SYMBOL
+int evdns_resolve_ipv6(const char *name, int flags, evdns_callback_type callback, void *ptr);
+
+struct in_addr;
+struct in6_addr;
+
+/**
+ Lookup a PTR record for a given IP address.
+
+ @deprecated This function is deprecated because it does not allow the
+ caller to specify which evdns_base it applies to. The recommended
+ function is evdns_base_resolve_reverse().
+
+ @param in an IPv4 address
+ @param flags either 0, or DNS_QUERY_NO_SEARCH to disable searching for this query.
+ @param callback a callback function to invoke when the request is completed
+ @param ptr an argument to pass to the callback function
+ @return 0 if successful, or -1 if an error occurred
+ @see evdns_resolve_reverse_ipv6()
+ */
+EVENT2_EXPORT_SYMBOL
+int evdns_resolve_reverse(const struct in_addr *in, int flags, evdns_callback_type callback, void *ptr);
+
+/**
+ Lookup a PTR record for a given IPv6 address.
+
+ @deprecated This function is deprecated because it does not allow the
+ caller to specify which evdns_base it applies to. The recommended
+ function is evdns_base_resolve_reverse_ipv6().
+
+ @param in an IPv6 address
+ @param flags either 0, or DNS_QUERY_NO_SEARCH to disable searching for this query.
+ @param callback a callback function to invoke when the request is completed
+ @param ptr an argument to pass to the callback function
+ @return 0 if successful, or -1 if an error occurred
+ @see evdns_resolve_reverse_ipv6()
+ */
+EVENT2_EXPORT_SYMBOL
+int evdns_resolve_reverse_ipv6(const struct in6_addr *in, int flags, evdns_callback_type callback, void *ptr);
+
+/**
+ Set the value of a configuration option.
+
+ The currently available configuration options are:
+
+ ndots, timeout, max-timeouts, max-inflight, and attempts
+
+ @deprecated This function is deprecated because it does not allow the
+ caller to specify which evdns_base it applies to. The recommended
+ function is evdns_base_set_option().
+
+ @param option the name of the configuration option to be modified
+ @param val the value to be set
+ @param flags Ignored.
+ @return 0 if successful, or -1 if an error occurred
+ */
+EVENT2_EXPORT_SYMBOL
+int evdns_set_option(const char *option, const char *val, int flags);
+
+/**
+ Parse a resolv.conf file.
+
+ The 'flags' parameter determines what information is parsed from the
+ resolv.conf file. See the man page for resolv.conf for the format of this
+ file.
+
+ The following directives are not parsed from the file: sortlist, rotate,
+ no-check-names, inet6, debug.
+
+ If this function encounters an error, the possible return values are: 1 =
+ failed to open file, 2 = failed to stat file, 3 = file too large, 4 = out of
+ memory, 5 = short read from file, 6 = no nameservers listed in the file
+
+ @deprecated This function is deprecated because it does not allow the
+ caller to specify which evdns_base it applies to. The recommended
+ function is evdns_base_resolv_conf_parse().
+
+ @param flags any of DNS_OPTION_NAMESERVERS|DNS_OPTION_SEARCH|DNS_OPTION_MISC|
+ DNS_OPTIONS_ALL
+ @param filename the path to the resolv.conf file
+ @return 0 if successful, or various positive error codes if an error
+ occurred (see above)
+ @see resolv.conf(3), evdns_config_windows_nameservers()
+ */
+EVENT2_EXPORT_SYMBOL
+int evdns_resolv_conf_parse(int flags, const char *const filename);
+
+/**
+ Clear the list of search domains.
+
+ @deprecated This function is deprecated because it does not allow the
+ caller to specify which evdns_base it applies to. The recommended
+ function is evdns_base_search_clear().
+ */
+EVENT2_EXPORT_SYMBOL
+void evdns_search_clear(void);
+
+/**
+ Add a domain to the list of search domains
+
+ @deprecated This function is deprecated because it does not allow the
+ caller to specify which evdns_base it applies to. The recommended
+ function is evdns_base_search_add().
+
+ @param domain the domain to be added to the search list
+ */
+EVENT2_EXPORT_SYMBOL
+void evdns_search_add(const char *domain);
+
+/**
+ Set the 'ndots' parameter for searches.
+
+ Sets the number of dots which, when found in a name, causes
+ the first query to be without any search domain.
+
+ @deprecated This function is deprecated because it does not allow the
+ caller to specify which evdns_base it applies to. The recommended
+ function is evdns_base_search_ndots_set().
+
+ @param ndots the new ndots parameter
+ */
+EVENT2_EXPORT_SYMBOL
+void evdns_search_ndots_set(const int ndots);
+
+/**
+ As evdns_server_new_with_base.
+
+ @deprecated This function is deprecated because it does not allow the
+ caller to specify which even_base it uses. The recommended
+ function is evdns_add_server_port_with_base().
+
+*/
+EVENT2_EXPORT_SYMBOL
+struct evdns_server_port *
+evdns_add_server_port(evutil_socket_t socket, int flags,
+ evdns_request_callback_fn_type callback, void *user_data);
+
+#ifdef _WIN32
+EVENT2_EXPORT_SYMBOL
+int evdns_config_windows_nameservers(void);
+#define EVDNS_CONFIG_WINDOWS_NAMESERVERS_IMPLEMENTED
+#endif
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* EVENT2_EVENT_COMPAT_H_INCLUDED_ */
diff --git a/libevent/include/event2/dns_struct.h b/libevent/include/event2/dns_struct.h
new file mode 100644
index 0000000..593a8a7
--- /dev/null
+++ b/libevent/include/event2/dns_struct.h
@@ -0,0 +1,80 @@
+/*
+ * Copyright (c) 2000-2007 Niels Provos <provos@citi.umich.edu>
+ * Copyright (c) 2007-2012 Niels Provos and Nick Mathewson
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ * derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+#ifndef EVENT2_DNS_STRUCT_H_INCLUDED_
+#define EVENT2_DNS_STRUCT_H_INCLUDED_
+
+/** @file event2/dns_struct.h
+
+ Data structures for dns. Using these structures may hurt forward
+ compatibility with later versions of Libevent: be careful!
+
+ */
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include <event2/event-config.h>
+#ifdef EVENT__HAVE_SYS_TYPES_H
+#include <sys/types.h>
+#endif
+#ifdef EVENT__HAVE_SYS_TIME_H
+#include <sys/time.h>
+#endif
+
+/* For int types. */
+#include <event2/util.h>
+
+/*
+ * Structures used to implement a DNS server.
+ */
+
+struct evdns_server_request {
+ int flags;
+ int nquestions;
+ struct evdns_server_question **questions;
+};
+struct evdns_server_question {
+ int type;
+#ifdef __cplusplus
+ int dns_question_class;
+#else
+ /* You should refer to this field as "dns_question_class". The
+ * name "class" works in C for backward compatibility, and will be
+ * removed in a future version. (1.5 or later). */
+ int class;
+#define dns_question_class class
+#endif
+ char name[1];
+};
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* EVENT2_DNS_STRUCT_H_INCLUDED_ */
+
diff --git a/libevent/include/event2/event.h b/libevent/include/event2/event.h
new file mode 100644
index 0000000..a6b6144
--- /dev/null
+++ b/libevent/include/event2/event.h
@@ -0,0 +1,1672 @@
+/*
+ * Copyright (c) 2000-2007 Niels Provos <provos@citi.umich.edu>
+ * Copyright (c) 2007-2012 Niels Provos and Nick Mathewson
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ * derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+#ifndef EVENT2_EVENT_H_INCLUDED_
+#define EVENT2_EVENT_H_INCLUDED_
+
+/**
+ @mainpage
+
+ @section intro Introduction
+
+ Libevent is an event notification library for developing scalable network
+ servers. The Libevent API provides a mechanism to execute a callback
+ function when a specific event occurs on a file descriptor or after a
+ timeout has been reached. Furthermore, Libevent also support callbacks due
+ to signals or regular timeouts.
+
+ Libevent is meant to replace the event loop found in event driven network
+ servers. An application just needs to call event_base_dispatch() and then add or
+ remove events dynamically without having to change the event loop.
+
+
+ Currently, Libevent supports /dev/poll, kqueue(2), select(2), poll(2),
+ epoll(4), and evports. The internal event mechanism is completely
+ independent of the exposed event API, and a simple update of Libevent can
+ provide new functionality without having to redesign the applications. As a
+ result, Libevent allows for portable application development and provides
+ the most scalable event notification mechanism available on an operating
+ system. Libevent can also be used for multithreaded programs. Libevent
+ should compile on Linux, *BSD, Mac OS X, Solaris and, Windows.
+
+ @section usage Standard usage
+
+ Every program that uses Libevent must include the <event2/event.h>
+ header, and pass the -levent flag to the linker. (You can instead link
+ -levent_core if you only want the main event and buffered IO-based code,
+ and don't want to link any protocol code.)
+
+ @section setup Library setup
+
+ Before you call any other Libevent functions, you need to set up the
+ library. If you're going to use Libevent from multiple threads in a
+ multithreaded application, you need to initialize thread support --
+ typically by using evthread_use_pthreads() or
+ evthread_use_windows_threads(). See <event2/thread.h> for more
+ information.
+
+ This is also the point where you can replace Libevent's memory
+ management functions with event_set_mem_functions, and enable debug mode
+ with event_enable_debug_mode().
+
+ @section base Creating an event base
+
+ Next, you need to create an event_base structure, using event_base_new()
+ or event_base_new_with_config(). The event_base is responsible for
+ keeping track of which events are "pending" (that is to say, being
+ watched to see if they become active) and which events are "active".
+ Every event is associated with a single event_base.
+
+ @section event Event notification
+
+ For each file descriptor that you wish to monitor, you must create an
+ event structure with event_new(). (You may also declare an event
+ structure and call event_assign() to initialize the members of the
+ structure.) To enable notification, you add the structure to the list
+ of monitored events by calling event_add(). The event structure must
+ remain allocated as long as it is active, so it should generally be
+ allocated on the heap.
+
+ @section loop Dispatching events.
+
+ Finally, you call event_base_dispatch() to loop and dispatch events.
+ You can also use event_base_loop() for more fine-grained control.
+
+ Currently, only one thread can be dispatching a given event_base at a
+ time. If you want to run events in multiple threads at once, you can
+ either have a single event_base whose events add work to a work queue,
+ or you can create multiple event_base objects.
+
+ @section bufferevent I/O Buffers
+
+ Libevent provides a buffered I/O abstraction on top of the regular event
+ callbacks. This abstraction is called a bufferevent. A bufferevent
+ provides input and output buffers that get filled and drained
+ automatically. The user of a buffered event no longer deals directly
+ with the I/O, but instead is reading from input and writing to output
+ buffers.
+
+ Once initialized via bufferevent_socket_new(), the bufferevent structure
+ can be used repeatedly with bufferevent_enable() and
+ bufferevent_disable(). Instead of reading and writing directly to a
+ socket, you would call bufferevent_read() and bufferevent_write().
+
+ When read enabled the bufferevent will try to read from the file descriptor
+ and call the read callback. The write callback is executed whenever the
+ output buffer is drained below the write low watermark, which is 0 by
+ default.
+
+ See <event2/bufferevent*.h> for more information.
+
+ @section timers Timers
+
+ Libevent can also be used to create timers that invoke a callback after a
+ certain amount of time has expired. The evtimer_new() macro returns
+ an event struct to use as a timer. To activate the timer, call
+ evtimer_add(). Timers can be deactivated by calling evtimer_del().
+ (These macros are thin wrappers around event_new(), event_add(),
+ and event_del(); you can also use those instead.)
+
+ @section evdns Asynchronous DNS resolution
+
+ Libevent provides an asynchronous DNS resolver that should be used instead
+ of the standard DNS resolver functions. See the <event2/dns.h>
+ functions for more detail.
+
+ @section evhttp Event-driven HTTP servers
+
+ Libevent provides a very simple event-driven HTTP server that can be
+ embedded in your program and used to service HTTP requests.
+
+ To use this capability, you need to include the <event2/http.h> header in your
+ program. See that header for more information.
+
+ @section evrpc A framework for RPC servers and clients
+
+ Libevent provides a framework for creating RPC servers and clients. It
+ takes care of marshaling and unmarshaling all data structures.
+
+ @section api API Reference
+
+ To browse the complete documentation of the libevent API, click on any of
+ the following links.
+
+ event2/event.h
+ The primary libevent header
+
+ event2/thread.h
+ Functions for use by multithreaded programs
+
+ event2/buffer.h and event2/bufferevent.h
+ Buffer management for network reading and writing
+
+ event2/util.h
+ Utility functions for portable nonblocking network code
+
+ event2/dns.h
+ Asynchronous DNS resolution
+
+ event2/http.h
+ An embedded libevent-based HTTP server
+
+ event2/rpc.h
+ A framework for creating RPC servers and clients
+
+ */
+
+/** @file event2/event.h
+
+ Core functions for waiting for and receiving events, and using event bases.
+*/
+
+#include <event2/visibility.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include <event2/event-config.h>
+#ifdef EVENT__HAVE_SYS_TYPES_H
+#include <sys/types.h>
+#endif
+#ifdef EVENT__HAVE_SYS_TIME_H
+#include <sys/time.h>
+#endif
+
+#include <stdio.h>
+
+/* For int types. */
+#include <event2/util.h>
+
+/**
+ * Structure to hold information and state for a Libevent dispatch loop.
+ *
+ * The event_base lies at the center of Libevent; every application will
+ * have one. It keeps track of all pending and active events, and
+ * notifies your application of the active ones.
+ *
+ * This is an opaque structure; you can allocate one using
+ * event_base_new() or event_base_new_with_config().
+ *
+ * @see event_base_new(), event_base_free(), event_base_loop(),
+ * event_base_new_with_config()
+ */
+struct event_base
+#ifdef EVENT_IN_DOXYGEN_
+{/*Empty body so that doxygen will generate documentation here.*/}
+#endif
+;
+
+/**
+ * @struct event
+ *
+ * Structure to represent a single event.
+ *
+ * An event can have some underlying condition it represents: a socket
+ * becoming readable or writeable (or both), or a signal becoming raised.
+ * (An event that represents no underlying condition is still useful: you
+ * can use one to implement a timer, or to communicate between threads.)
+ *
+ * Generally, you can create events with event_new(), then make them
+ * pending with event_add(). As your event_base runs, it will run the
+ * callbacks of an events whose conditions are triggered. When you no
+ * longer want the event, free it with event_free().
+ *
+ * In more depth:
+ *
+ * An event may be "pending" (one whose condition we are watching),
+ * "active" (one whose condition has triggered and whose callback is about
+ * to run), neither, or both. Events come into existence via
+ * event_assign() or event_new(), and are then neither active nor pending.
+ *
+ * To make an event pending, pass it to event_add(). When doing so, you
+ * can also set a timeout for the event.
+ *
+ * Events become active during an event_base_loop() call when either their
+ * condition has triggered, or when their timeout has elapsed. You can
+ * also activate an event manually using event_active(). The even_base
+ * loop will run the callbacks of active events; after it has done so, it
+ * marks them as no longer active.
+ *
+ * You can make an event non-pending by passing it to event_del(). This
+ * also makes the event non-active.
+ *
+ * Events can be "persistent" or "non-persistent". A non-persistent event
+ * becomes non-pending as soon as it is triggered: thus, it only runs at
+ * most once per call to event_add(). A persistent event remains pending
+ * even when it becomes active: you'll need to event_del() it manually in
+ * order to make it non-pending. When a persistent event with a timeout
+ * becomes active, its timeout is reset: this means you can use persistent
+ * events to implement periodic timeouts.
+ *
+ * This should be treated as an opaque structure; you should never read or
+ * write any of its fields directly. For backward compatibility with old
+ * code, it is defined in the event2/event_struct.h header; including this
+ * header may make your code incompatible with other versions of Libevent.
+ *
+ * @see event_new(), event_free(), event_assign(), event_get_assignment(),
+ * event_add(), event_del(), event_active(), event_pending(),
+ * event_get_fd(), event_get_base(), event_get_events(),
+ * event_get_callback(), event_get_callback_arg(),
+ * event_priority_set()
+ */
+struct event
+#ifdef EVENT_IN_DOXYGEN_
+{/*Empty body so that doxygen will generate documentation here.*/}
+#endif
+;
+
+/**
+ * Configuration for an event_base.
+ *
+ * There are many options that can be used to alter the behavior and
+ * implementation of an event_base. To avoid having to pass them all in a
+ * complex many-argument constructor, we provide an abstract data type
+ * where you set up configuration information before passing it to
+ * event_base_new_with_config().
+ *
+ * @see event_config_new(), event_config_free(), event_base_new_with_config(),
+ * event_config_avoid_method(), event_config_require_features(),
+ * event_config_set_flag(), event_config_set_num_cpus_hint()
+ */
+struct event_config
+#ifdef EVENT_IN_DOXYGEN_
+{/*Empty body so that doxygen will generate documentation here.*/}
+#endif
+;
+
+/**
+ * Enable some relatively expensive debugging checks in Libevent that
+ * would normally be turned off. Generally, these checks cause code that
+ * would otherwise crash mysteriously to fail earlier with an assertion
+ * failure. Note that this method MUST be called before any events or
+ * event_bases have been created.
+ *
+ * Debug mode can currently catch the following errors:
+ * An event is re-assigned while it is added
+ * Any function is called on a non-assigned event
+ *
+ * Note that debugging mode uses memory to track every event that has been
+ * initialized (via event_assign, event_set, or event_new) but not yet
+ * released (via event_free or event_debug_unassign). If you want to use
+ * debug mode, and you find yourself running out of memory, you will need
+ * to use event_debug_unassign to explicitly stop tracking events that
+ * are no longer considered set-up.
+ *
+ * @see event_debug_unassign()
+ */
+EVENT2_EXPORT_SYMBOL
+void event_enable_debug_mode(void);
+
+/**
+ * When debugging mode is enabled, informs Libevent that an event should no
+ * longer be considered as assigned. When debugging mode is not enabled, does
+ * nothing.
+ *
+ * This function must only be called on a non-added event.
+ *
+ * @see event_enable_debug_mode()
+ */
+EVENT2_EXPORT_SYMBOL
+void event_debug_unassign(struct event *);
+
+/**
+ * Create and return a new event_base to use with the rest of Libevent.
+ *
+ * @return a new event_base on success, or NULL on failure.
+ *
+ * @see event_base_free(), event_base_new_with_config()
+ */
+EVENT2_EXPORT_SYMBOL
+struct event_base *event_base_new(void);
+
+/**
+ Reinitialize the event base after a fork
+
+ Some event mechanisms do not survive across fork. The event base needs
+ to be reinitialized with the event_reinit() function.
+
+ @param base the event base that needs to be re-initialized
+ @return 0 if successful, or -1 if some events could not be re-added.
+ @see event_base_new()
+*/
+EVENT2_EXPORT_SYMBOL
+int event_reinit(struct event_base *base);
+
+/**
+ Event dispatching loop
+
+ This loop will run the event base until either there are no more pending or
+ active, or until something calls event_base_loopbreak() or
+ event_base_loopexit().
+
+ @param base the event_base structure returned by event_base_new() or
+ event_base_new_with_config()
+ @return 0 if successful, -1 if an error occurred, or 1 if we exited because
+ no events were pending or active.
+ @see event_base_loop()
+ */
+EVENT2_EXPORT_SYMBOL
+int event_base_dispatch(struct event_base *);
+
+/**
+ Get the kernel event notification mechanism used by Libevent.
+
+ @param eb the event_base structure returned by event_base_new()
+ @return a string identifying the kernel event mechanism (kqueue, epoll, etc.)
+ */
+EVENT2_EXPORT_SYMBOL
+const char *event_base_get_method(const struct event_base *);
+
+/**
+ Gets all event notification mechanisms supported by Libevent.
+
+ This functions returns the event mechanism in order preferred by
+ Libevent. Note that this list will include all backends that
+ Libevent has compiled-in support for, and will not necessarily check
+ your OS to see whether it has the required resources.
+
+ @return an array with pointers to the names of support methods.
+ The end of the array is indicated by a NULL pointer. If an
+ error is encountered NULL is returned.
+*/
+EVENT2_EXPORT_SYMBOL
+const char **event_get_supported_methods(void);
+
+/** Query the current monotonic time from a the timer for a struct
+ * event_base.
+ */
+EVENT2_EXPORT_SYMBOL
+int event_gettime_monotonic(struct event_base *base, struct timeval *tp);
+
+/**
+ @name event type flag
+
+ Flags to pass to event_base_get_num_events() to specify the kinds of events
+ we want to aggregate counts for
+*/
+/**@{*/
+/** count the number of active events, which have been triggered.*/
+#define EVENT_BASE_COUNT_ACTIVE 1U
+/** count the number of virtual events, which is used to represent an internal
+ * condition, other than a pending event, that keeps the loop from exiting. */
+#define EVENT_BASE_COUNT_VIRTUAL 2U
+/** count the number of events which have been added to event base, including
+ * internal events. */
+#define EVENT_BASE_COUNT_ADDED 4U
+/**@}*/
+
+/**
+ Gets the number of events in event_base, as specified in the flags.
+
+ Since event base has some internal events added to make some of its
+ functionalities work, EVENT_BASE_COUNT_ADDED may return more than the
+ number of events you added using event_add().
+
+ If you pass EVENT_BASE_COUNT_ACTIVE and EVENT_BASE_COUNT_ADDED together, an
+ active event will be counted twice. However, this might not be the case in
+ future libevent versions. The return value is an indication of the work
+ load, but the user shouldn't rely on the exact value as this may change in
+ the future.
+
+ @param eb the event_base structure returned by event_base_new()
+ @param flags a bitwise combination of the kinds of events to aggregate
+ counts for
+ @return the number of events specified in the flags
+*/
+EVENT2_EXPORT_SYMBOL
+int event_base_get_num_events(struct event_base *, unsigned int);
+
+/**
+ Get the maximum number of events in a given event_base as specified in the
+ flags.
+
+ @param eb the event_base structure returned by event_base_new()
+ @param flags a bitwise combination of the kinds of events to aggregate
+ counts for
+ @param clear option used to reset the maximum count.
+ @return the number of events specified in the flags
+ */
+EVENT2_EXPORT_SYMBOL
+int event_base_get_max_events(struct event_base *, unsigned int, int);
+
+/**
+ Allocates a new event configuration object.
+
+ The event configuration object can be used to change the behavior of
+ an event base.
+
+ @return an event_config object that can be used to store configuration, or
+ NULL if an error is encountered.
+ @see event_base_new_with_config(), event_config_free(), event_config
+*/
+EVENT2_EXPORT_SYMBOL
+struct event_config *event_config_new(void);
+
+/**
+ Deallocates all memory associated with an event configuration object
+
+ @param cfg the event configuration object to be freed.
+*/
+EVENT2_EXPORT_SYMBOL
+void event_config_free(struct event_config *cfg);
+
+/**
+ Enters an event method that should be avoided into the configuration.
+
+ This can be used to avoid event mechanisms that do not support certain
+ file descriptor types, or for debugging to avoid certain event
+ mechanisms. An application can make use of multiple event bases to
+ accommodate incompatible file descriptor types.
+
+ @param cfg the event configuration object
+ @param method the name of the event method to avoid
+ @return 0 on success, -1 on failure.
+*/
+EVENT2_EXPORT_SYMBOL
+int event_config_avoid_method(struct event_config *cfg, const char *method);
+
+/**
+ A flag used to describe which features an event_base (must) provide.
+
+ Because of OS limitations, not every Libevent backend supports every
+ possible feature. You can use this type with
+ event_config_require_features() to tell Libevent to only proceed if your
+ event_base implements a given feature, and you can receive this type from
+ event_base_get_features() to see which features are available.
+*/
+enum event_method_feature {
+ /** Require an event method that allows edge-triggered events with EV_ET. */
+ EV_FEATURE_ET = 0x01,
+ /** Require an event method where having one event triggered among
+ * many is [approximately] an O(1) operation. This excludes (for
+ * example) select and poll, which are approximately O(N) for N
+ * equal to the total number of possible events. */
+ EV_FEATURE_O1 = 0x02,
+ /** Require an event method that allows file descriptors as well as
+ * sockets. */
+ EV_FEATURE_FDS = 0x04,
+ /** Require an event method that allows you to use EV_CLOSED to detect
+ * connection close without the necessity of reading all the pending data.
+ *
+ * Methods that do support EV_CLOSED may not be able to provide support on
+ * all kernel versions.
+ **/
+ EV_FEATURE_EARLY_CLOSE = 0x08
+};
+
+/**
+ A flag passed to event_config_set_flag().
+
+ These flags change the behavior of an allocated event_base.
+
+ @see event_config_set_flag(), event_base_new_with_config(),
+ event_method_feature
+ */
+enum event_base_config_flag {
+ /** Do not allocate a lock for the event base, even if we have
+ locking set up.
+
+ Setting this option will make it unsafe and nonfunctional to call
+ functions on the base concurrently from multiple threads.
+ */
+ EVENT_BASE_FLAG_NOLOCK = 0x01,
+ /** Do not check the EVENT_* environment variables when configuring
+ an event_base */
+ EVENT_BASE_FLAG_IGNORE_ENV = 0x02,
+ /** Windows only: enable the IOCP dispatcher at startup
+
+ If this flag is set then bufferevent_socket_new() and
+ evconn_listener_new() will use IOCP-backed implementations
+ instead of the usual select-based one on Windows.
+ */
+ EVENT_BASE_FLAG_STARTUP_IOCP = 0x04,
+ /** Instead of checking the current time every time the event loop is
+ ready to run timeout callbacks, check after each timeout callback.
+ */
+ EVENT_BASE_FLAG_NO_CACHE_TIME = 0x08,
+
+ /** If we are using the epoll backend, this flag says that it is
+ safe to use Libevent's internal change-list code to batch up
+ adds and deletes in order to try to do as few syscalls as
+ possible. Setting this flag can make your code run faster, but
+ it may trigger a Linux bug: it is not safe to use this flag
+ if you have any fds cloned by dup() or its variants. Doing so
+ will produce strange and hard-to-diagnose bugs.
+
+ This flag can also be activated by setting the
+ EVENT_EPOLL_USE_CHANGELIST environment variable.
+
+ This flag has no effect if you wind up using a backend other than
+ epoll.
+ */
+ EVENT_BASE_FLAG_EPOLL_USE_CHANGELIST = 0x10,
+
+ /** Ordinarily, Libevent implements its time and timeout code using
+ the fastest monotonic timer that we have. If this flag is set,
+ however, we use less efficient more precise timer, assuming one is
+ present.
+ */
+ EVENT_BASE_FLAG_PRECISE_TIMER = 0x20
+};
+
+/**
+ Return a bitmask of the features implemented by an event base. This
+ will be a bitwise OR of one or more of the values of
+ event_method_feature
+
+ @see event_method_feature
+ */
+EVENT2_EXPORT_SYMBOL
+int event_base_get_features(const struct event_base *base);
+
+/**
+ Enters a required event method feature that the application demands.
+
+ Note that not every feature or combination of features is supported
+ on every platform. Code that requests features should be prepared
+ to handle the case where event_base_new_with_config() returns NULL, as in:
+ <pre>
+ event_config_require_features(cfg, EV_FEATURE_ET);
+ base = event_base_new_with_config(cfg);
+ if (base == NULL) {
+ // We can't get edge-triggered behavior here.
+ event_config_require_features(cfg, 0);
+ base = event_base_new_with_config(cfg);
+ }
+ </pre>
+
+ @param cfg the event configuration object
+ @param feature a bitfield of one or more event_method_feature values.
+ Replaces values from previous calls to this function.
+ @return 0 on success, -1 on failure.
+ @see event_method_feature, event_base_new_with_config()
+*/
+EVENT2_EXPORT_SYMBOL
+int event_config_require_features(struct event_config *cfg, int feature);
+
+/**
+ * Sets one or more flags to configure what parts of the eventual event_base
+ * will be initialized, and how they'll work.
+ *
+ * @see event_base_config_flags, event_base_new_with_config()
+ **/
+EVENT2_EXPORT_SYMBOL
+int event_config_set_flag(struct event_config *cfg, int flag);
+
+/**
+ * Records a hint for the number of CPUs in the system. This is used for
+ * tuning thread pools, etc, for optimal performance. In Libevent 2.0,
+ * it is only on Windows, and only when IOCP is in use.
+ *
+ * @param cfg the event configuration object
+ * @param cpus the number of cpus
+ * @return 0 on success, -1 on failure.
+ */
+EVENT2_EXPORT_SYMBOL
+int event_config_set_num_cpus_hint(struct event_config *cfg, int cpus);
+
+/**
+ * Record an interval and/or a number of callbacks after which the event base
+ * should check for new events. By default, the event base will run as many
+ * events are as activated at the highest activated priority before checking
+ * for new events. If you configure it by setting max_interval, it will check
+ * the time after each callback, and not allow more than max_interval to
+ * elapse before checking for new events. If you configure it by setting
+ * max_callbacks to a value >= 0, it will run no more than max_callbacks
+ * callbacks before checking for new events.
+ *
+ * This option can decrease the latency of high-priority events, and
+ * avoid priority inversions where multiple low-priority events keep us from
+ * polling for high-priority events, but at the expense of slightly decreasing
+ * the throughput. Use it with caution!
+ *
+ * @param cfg The event_base configuration object.
+ * @param max_interval An interval after which Libevent should stop running
+ * callbacks and check for more events, or NULL if there should be
+ * no such interval.
+ * @param max_callbacks A number of callbacks after which Libevent should
+ * stop running callbacks and check for more events, or -1 if there
+ * should be no such limit.
+ * @param min_priority A priority below which max_interval and max_callbacks
+ * should not be enforced. If this is set to 0, they are enforced
+ * for events of every priority; if it's set to 1, they're enforced
+ * for events of priority 1 and above, and so on.
+ * @return 0 on success, -1 on failure.
+ **/
+EVENT2_EXPORT_SYMBOL
+int event_config_set_max_dispatch_interval(struct event_config *cfg,
+ const struct timeval *max_interval, int max_callbacks,
+ int min_priority);
+
+/**
+ Initialize the event API.
+
+ Use event_base_new_with_config() to initialize a new event base, taking
+ the specified configuration under consideration. The configuration object
+ can currently be used to avoid certain event notification mechanisms.
+
+ @param cfg the event configuration object
+ @return an initialized event_base that can be used to registering events,
+ or NULL if no event base can be created with the requested event_config.
+ @see event_base_new(), event_base_free(), event_init(), event_assign()
+*/
+EVENT2_EXPORT_SYMBOL
+struct event_base *event_base_new_with_config(const struct event_config *);
+
+/**
+ Deallocate all memory associated with an event_base, and free the base.
+
+ Note that this function will not close any fds or free any memory passed
+ to event_new as the argument to callback.
+
+ If there are any pending finalizer callbacks, this function will invoke
+ them.
+
+ @param eb an event_base to be freed
+ */
+EVENT2_EXPORT_SYMBOL
+void event_base_free(struct event_base *);
+
+/**
+ As event_base_free, but do not run finalizers.
+ */
+EVENT2_EXPORT_SYMBOL
+void event_base_free_nofinalize(struct event_base *);
+
+/** @name Log severities
+ */
+/**@{*/
+#define EVENT_LOG_DEBUG 0
+#define EVENT_LOG_MSG 1
+#define EVENT_LOG_WARN 2
+#define EVENT_LOG_ERR 3
+/**@}*/
+
+/* Obsolete names: these are deprecated, but older programs might use them.
+ * They violate the reserved-identifier namespace. */
+#define _EVENT_LOG_DEBUG EVENT_LOG_DEBUG
+#define _EVENT_LOG_MSG EVENT_LOG_MSG
+#define _EVENT_LOG_WARN EVENT_LOG_WARN
+#define _EVENT_LOG_ERR EVENT_LOG_ERR
+
+/**
+ A callback function used to intercept Libevent's log messages.
+
+ @see event_set_log_callback
+ */
+typedef void (*event_log_cb)(int severity, const char *msg);
+/**
+ Redirect Libevent's log messages.
+
+ @param cb a function taking two arguments: an integer severity between
+ EVENT_LOG_DEBUG and EVENT_LOG_ERR, and a string. If cb is NULL,
+ then the default log is used.
+
+ NOTE: The function you provide *must not* call any other libevent
+ functionality. Doing so can produce undefined behavior.
+ */
+EVENT2_EXPORT_SYMBOL
+void event_set_log_callback(event_log_cb cb);
+
+/**
+ A function to be called if Libevent encounters a fatal internal error.
+
+ @see event_set_fatal_callback
+ */
+typedef void (*event_fatal_cb)(int err);
+
+/**
+ Override Libevent's behavior in the event of a fatal internal error.
+
+ By default, Libevent will call exit(1) if a programming error makes it
+ impossible to continue correct operation. This function allows you to supply
+ another callback instead. Note that if the function is ever invoked,
+ something is wrong with your program, or with Libevent: any subsequent calls
+ to Libevent may result in undefined behavior.
+
+ Libevent will (almost) always log an EVENT_LOG_ERR message before calling
+ this function; look at the last log message to see why Libevent has died.
+ */
+EVENT2_EXPORT_SYMBOL
+void event_set_fatal_callback(event_fatal_cb cb);
+
+#define EVENT_DBG_ALL 0xffffffffu
+#define EVENT_DBG_NONE 0
+
+/**
+ Turn on debugging logs and have them sent to the default log handler.
+
+ This is a global setting; if you are going to call it, you must call this
+ before any calls that create an event-base. You must call it before any
+ multithreaded use of Libevent.
+
+ Debug logs are verbose.
+
+ @param which Controls which debug messages are turned on. This option is
+ unused for now; for forward compatibility, you must pass in the constant
+ "EVENT_DBG_ALL" to turn debugging logs on, or "EVENT_DBG_NONE" to turn
+ debugging logs off.
+ */
+EVENT2_EXPORT_SYMBOL
+void event_enable_debug_logging(ev_uint32_t which);
+
+/**
+ Associate a different event base with an event.
+
+ The event to be associated must not be currently active or pending.
+
+ @param eb the event base
+ @param ev the event
+ @return 0 on success, -1 on failure.
+ */
+EVENT2_EXPORT_SYMBOL
+int event_base_set(struct event_base *, struct event *);
+
+/** @name Loop flags
+
+ These flags control the behavior of event_base_loop().
+ */
+/**@{*/
+/** Block until we have an active event, then exit once all active events
+ * have had their callbacks run. */
+#define EVLOOP_ONCE 0x01
+/** Do not block: see which events are ready now, run the callbacks
+ * of the highest-priority ones, then exit. */
+#define EVLOOP_NONBLOCK 0x02
+/** Do not exit the loop because we have no pending events. Instead, keep
+ * running until event_base_loopexit() or event_base_loopbreak() makes us
+ * stop.
+ */
+#define EVLOOP_NO_EXIT_ON_EMPTY 0x04
+/**@}*/
+
+/**
+ Wait for events to become active, and run their callbacks.
+
+ This is a more flexible version of event_base_dispatch().
+
+ By default, this loop will run the event base until either there are no more
+ pending or active events, or until something calls event_base_loopbreak() or
+ event_base_loopexit(). You can override this behavior with the 'flags'
+ argument.
+
+ @param eb the event_base structure returned by event_base_new() or
+ event_base_new_with_config()
+ @param flags any combination of EVLOOP_ONCE | EVLOOP_NONBLOCK
+ @return 0 if successful, -1 if an error occurred, or 1 if we exited because
+ no events were pending or active.
+ @see event_base_loopexit(), event_base_dispatch(), EVLOOP_ONCE,
+ EVLOOP_NONBLOCK
+ */
+EVENT2_EXPORT_SYMBOL
+int event_base_loop(struct event_base *, int);
+
+/**
+ Exit the event loop after the specified time
+
+ The next event_base_loop() iteration after the given timer expires will
+ complete normally (handling all queued events) then exit without
+ blocking for events again.
+
+ Subsequent invocations of event_base_loop() will proceed normally.
+
+ @param eb the event_base structure returned by event_init()
+ @param tv the amount of time after which the loop should terminate,
+ or NULL to exit after running all currently active events.
+ @return 0 if successful, or -1 if an error occurred
+ @see event_base_loopbreak()
+ */
+EVENT2_EXPORT_SYMBOL
+int event_base_loopexit(struct event_base *, const struct timeval *);
+
+/**
+ Abort the active event_base_loop() immediately.
+
+ event_base_loop() will abort the loop after the next event is completed;
+ event_base_loopbreak() is typically invoked from this event's callback.
+ This behavior is analogous to the "break;" statement.
+
+ Subsequent invocations of event_base_loop() will proceed normally.
+
+ @param eb the event_base structure returned by event_init()
+ @return 0 if successful, or -1 if an error occurred
+ @see event_base_loopexit()
+ */
+EVENT2_EXPORT_SYMBOL
+int event_base_loopbreak(struct event_base *);
+
+/**
+ Tell the active event_base_loop() to scan for new events immediately.
+
+ Calling this function makes the currently active event_base_loop()
+ start the loop over again (scanning for new events) after the current
+ event callback finishes. If the event loop is not running, this
+ function has no effect.
+
+ event_base_loopbreak() is typically invoked from this event's callback.
+ This behavior is analogous to the "continue;" statement.
+
+ Subsequent invocations of event loop will proceed normally.
+
+ @param eb the event_base structure returned by event_init()
+ @return 0 if successful, or -1 if an error occurred
+ @see event_base_loopbreak()
+ */
+EVENT2_EXPORT_SYMBOL
+int event_base_loopcontinue(struct event_base *);
+
+/**
+ Checks if the event loop was told to exit by event_base_loopexit().
+
+ This function will return true for an event_base at every point after
+ event_loopexit() is called, until the event loop is next entered.
+
+ @param eb the event_base structure returned by event_init()
+ @return true if event_base_loopexit() was called on this event base,
+ or 0 otherwise
+ @see event_base_loopexit()
+ @see event_base_got_break()
+ */
+EVENT2_EXPORT_SYMBOL
+int event_base_got_exit(struct event_base *);
+
+/**
+ Checks if the event loop was told to abort immediately by event_base_loopbreak().
+
+ This function will return true for an event_base at every point after
+ event_base_loopbreak() is called, until the event loop is next entered.
+
+ @param eb the event_base structure returned by event_init()
+ @return true if event_base_loopbreak() was called on this event base,
+ or 0 otherwise
+ @see event_base_loopbreak()
+ @see event_base_got_exit()
+ */
+EVENT2_EXPORT_SYMBOL
+int event_base_got_break(struct event_base *);
+
+/**
+ * @name event flags
+ *
+ * Flags to pass to event_new(), event_assign(), event_pending(), and
+ * anything else with an argument of the form "short events"
+ */
+/**@{*/
+/** Indicates that a timeout has occurred. It's not necessary to pass
+ * this flag to event_for new()/event_assign() to get a timeout. */
+#define EV_TIMEOUT 0x01
+/** Wait for a socket or FD to become readable */
+#define EV_READ 0x02
+/** Wait for a socket or FD to become writeable */
+#define EV_WRITE 0x04
+/** Wait for a POSIX signal to be raised*/
+#define EV_SIGNAL 0x08
+/**
+ * Persistent event: won't get removed automatically when activated.
+ *
+ * When a persistent event with a timeout becomes activated, its timeout
+ * is reset to 0.
+ */
+#define EV_PERSIST 0x10
+/** Select edge-triggered behavior, if supported by the backend. */
+#define EV_ET 0x20
+/**
+ * If this option is provided, then event_del() will not block in one thread
+ * while waiting for the event callback to complete in another thread.
+ *
+ * To use this option safely, you may need to use event_finalize() or
+ * event_free_finalize() in order to safely tear down an event in a
+ * multithreaded application. See those functions for more information.
+ **/
+#define EV_FINALIZE 0x40
+/**
+ * Detects connection close events. You can use this to detect when a
+ * connection has been closed, without having to read all the pending data
+ * from a connection.
+ *
+ * Not all backends support EV_CLOSED. To detect or require it, use the
+ * feature flag EV_FEATURE_EARLY_CLOSE.
+ **/
+#define EV_CLOSED 0x80
+/**@}*/
+
+/**
+ @name evtimer_* macros
+
+ Aliases for working with one-shot timer events
+ If you need EV_PERSIST timer use event_*() functions.
+ */
+/**@{*/
+#define evtimer_assign(ev, b, cb, arg) \
+ event_assign((ev), (b), -1, 0, (cb), (arg))
+#define evtimer_new(b, cb, arg) event_new((b), -1, 0, (cb), (arg))
+#define evtimer_add(ev, tv) event_add((ev), (tv))
+#define evtimer_del(ev) event_del(ev)
+#define evtimer_pending(ev, tv) event_pending((ev), EV_TIMEOUT, (tv))
+#define evtimer_initialized(ev) event_initialized(ev)
+/**@}*/
+
+/**
+ @name evsignal_* macros
+
+ Aliases for working with signal events
+ */
+/**@{*/
+#define evsignal_add(ev, tv) event_add((ev), (tv))
+#define evsignal_assign(ev, b, x, cb, arg) \
+ event_assign((ev), (b), (x), EV_SIGNAL|EV_PERSIST, cb, (arg))
+#define evsignal_new(b, x, cb, arg) \
+ event_new((b), (x), EV_SIGNAL|EV_PERSIST, (cb), (arg))
+#define evsignal_del(ev) event_del(ev)
+#define evsignal_pending(ev, tv) event_pending((ev), EV_SIGNAL, (tv))
+#define evsignal_initialized(ev) event_initialized(ev)
+/**@}*/
+
+/**
+ @name evuser_* macros
+
+ Aliases for working with user-triggered events
+ If you need EV_PERSIST event use event_*() functions.
+ */
+/**@{*/
+#define evuser_new(b, cb, arg) event_new((b), -1, 0, (cb), (arg))
+#define evuser_del(ev) event_del(ev)
+#define evuser_pending(ev, tv) event_pending((ev), 0, (tv))
+#define evuser_initialized(ev) event_initialized(ev)
+#define evuser_trigger(ev) event_active((ev), 0, 0)
+/**@}*/
+
+/**
+ A callback function for an event.
+
+ It receives three arguments:
+
+ @param fd An fd or signal
+ @param events One or more EV_* flags
+ @param arg A user-supplied argument.
+
+ @see event_new()
+ */
+typedef void (*event_callback_fn)(evutil_socket_t, short, void *);
+
+/**
+ Return a value used to specify that the event itself must be used as the callback argument.
+
+ The function event_new() takes a callback argument which is passed
+ to the event's callback function. To specify that the argument to be
+ passed to the callback function is the event that event_new() returns,
+ pass in the return value of event_self_cbarg() as the callback argument
+ for event_new().
+
+ For example:
+ <pre>
+ struct event *ev = event_new(base, sock, events, callback, %event_self_cbarg());
+ </pre>
+
+ For consistency with event_new(), it is possible to pass the return value
+ of this function as the callback argument for event_assign() &ndash; this
+ achieves the same result as passing the event in directly.
+
+ @return a value to be passed as the callback argument to event_new() or
+ event_assign().
+ @see event_new(), event_assign()
+ */
+EVENT2_EXPORT_SYMBOL
+void *event_self_cbarg(void);
+
+/**
+ Allocate and assign a new event structure, ready to be added.
+
+ The function event_new() returns a new event that can be used in
+ future calls to event_add() and event_del(). The fd and events
+ arguments determine which conditions will trigger the event; the
+ callback and callback_arg arguments tell Libevent what to do when the
+ event becomes active.
+
+ If events contains one of EV_READ, EV_WRITE, or EV_READ|EV_WRITE, then
+ fd is a file descriptor or socket that should get monitored for
+ readiness to read, readiness to write, or readiness for either operation
+ (respectively). If events contains EV_SIGNAL, then fd is a signal
+ number to wait for. If events contains none of those flags, then the
+ event can be triggered only by a timeout or by manual activation with
+ event_active(): In this case, fd must be -1.
+
+ The EV_PERSIST flag can also be passed in the events argument: it makes
+ event_add() persistent until event_del() is called.
+
+ The EV_ET flag is compatible with EV_READ and EV_WRITE, and supported
+ only by certain backends. It tells Libevent to use edge-triggered
+ events.
+
+ The EV_TIMEOUT flag has no effect here.
+
+ It is okay to have multiple events all listening on the same fds; but
+ they must either all be edge-triggered, or all not be edge triggered.
+
+ When the event becomes active, the event loop will run the provided
+ callback function, with three arguments. The first will be the provided
+ fd value. The second will be a bitfield of the events that triggered:
+ EV_READ, EV_WRITE, or EV_SIGNAL. Here the EV_TIMEOUT flag indicates
+ that a timeout occurred, and EV_ET indicates that an edge-triggered
+ event occurred. The third event will be the callback_arg pointer that
+ you provide.
+
+ @param base the event base to which the event should be attached.
+ @param fd the file descriptor or signal to be monitored, or -1.
+ @param events desired events to monitor: bitfield of EV_READ, EV_WRITE,
+ EV_SIGNAL, EV_PERSIST, EV_ET.
+ @param callback callback function to be invoked when the event occurs
+ @param callback_arg an argument to be passed to the callback function
+
+ @return a newly allocated struct event that must later be freed with
+ event_free() or NULL if an error occurred.
+ @see event_free(), event_add(), event_del(), event_assign()
+ */
+EVENT2_EXPORT_SYMBOL
+struct event *event_new(struct event_base *, evutil_socket_t, short, event_callback_fn, void *);
+
+
+/**
+ Prepare a new, already-allocated event structure to be added.
+
+ The function event_assign() prepares the event structure ev to be used
+ in future calls to event_add() and event_del(). Unlike event_new(), it
+ doesn't allocate memory itself: it requires that you have already
+ allocated a struct event, probably on the heap. Doing this will
+ typically make your code depend on the size of the event structure, and
+ thereby create incompatibility with future versions of Libevent.
+
+ The easiest way to avoid this problem is just to use event_new() and
+ event_free() instead.
+
+ A slightly harder way to future-proof your code is to use
+ event_get_struct_event_size() to determine the required size of an event
+ at runtime.
+
+ Note that it is NOT safe to call this function on an event that is
+ active or pending. Doing so WILL corrupt internal data structures in
+ Libevent, and lead to strange, hard-to-diagnose bugs. You _can_ use
+ event_assign to change an existing event, but only if it is not active
+ or pending!
+
+ The arguments for this function, and the behavior of the events that it
+ makes, are as for event_new().
+
+ @param ev an event struct to be modified
+ @param base the event base to which ev should be attached.
+ @param fd the file descriptor to be monitored
+ @param events desired events to monitor; can be EV_READ and/or EV_WRITE
+ @param callback callback function to be invoked when the event occurs
+ @param callback_arg an argument to be passed to the callback function
+
+ @return 0 if success, or -1 on invalid arguments.
+
+ @see event_new(), event_add(), event_del(), event_base_once(),
+ event_get_struct_event_size()
+ */
+EVENT2_EXPORT_SYMBOL
+int event_assign(struct event *, struct event_base *, evutil_socket_t, short, event_callback_fn, void *);
+
+/**
+ Deallocate a struct event * returned by event_new().
+
+ If the event is pending or active, this function makes it non-pending
+ and non-active first.
+ */
+EVENT2_EXPORT_SYMBOL
+void event_free(struct event *);
+
+/**
+ * Callback type for event_finalize and event_free_finalize().
+ **/
+typedef void (*event_finalize_callback_fn)(struct event *, void *);
+/**
+ @name Finalization functions
+
+ These functions are used to safely tear down an event in a multithreaded
+ application. If you construct your events with EV_FINALIZE to avoid
+ deadlocks, you will need a way to remove an event in the certainty that
+ it will definitely not be running its callback when you deallocate it
+ and its callback argument.
+
+ To do this, call one of event_finalize() or event_free_finalize with
+ 0 for its first argument, the event to tear down as its second argument,
+ and a callback function as its third argument. The callback will be
+ invoked as part of the event loop, with the event's priority.
+
+ After you call a finalizer function, event_add() and event_active() will
+ no longer work on the event, and event_del() will produce a no-op. You
+ must not try to change the event's fields with event_assign() or
+ event_set() while the finalize callback is in progress. Once the
+ callback has been invoked, you should treat the event structure as
+ containing uninitialized memory.
+
+ The event_free_finalize() function frees the event after it's finalized;
+ event_finalize() does not.
+
+ A finalizer callback must not make events pending or active. It must not
+ add events, activate events, or attempt to "resuscitate" the event being
+ finalized in any way.
+
+ @return 0 on success, -1 on failure.
+ */
+/**@{*/
+EVENT2_EXPORT_SYMBOL
+int event_finalize(unsigned, struct event *, event_finalize_callback_fn);
+EVENT2_EXPORT_SYMBOL
+int event_free_finalize(unsigned, struct event *, event_finalize_callback_fn);
+/**@}*/
+
+/**
+ Schedule a one-time event
+
+ The function event_base_once() is similar to event_new(). However, it
+ schedules a callback to be called exactly once, and does not require the
+ caller to prepare an event structure.
+
+ Note that in Libevent 2.0 and earlier, if the event is never triggered, the
+ internal memory used to hold it will never be freed. In Libevent 2.1,
+ the internal memory will get freed by event_base_free() if the event
+ is never triggered. The 'arg' value, however, will not get freed in either
+ case--you'll need to free that on your own if you want it to go away.
+
+ @param base an event_base
+ @param fd a file descriptor to monitor, or -1 for no fd.
+ @param events event(s) to monitor; can be any of EV_READ |
+ EV_WRITE, or EV_TIMEOUT
+ @param callback callback function to be invoked when the event occurs
+ @param arg an argument to be passed to the callback function
+ @param timeout the maximum amount of time to wait for the event. NULL
+ makes an EV_READ/EV_WRITE event make forever; NULL makes an
+ EV_TIMEOUT event success immediately.
+ @return 0 if successful, or -1 if an error occurred
+ */
+EVENT2_EXPORT_SYMBOL
+int event_base_once(struct event_base *, evutil_socket_t, short, event_callback_fn, void *, const struct timeval *);
+
+/**
+ Add an event to the set of pending events.
+
+ The function event_add() schedules the execution of the event 'ev' when the
+ condition specified by event_assign() or event_new() occurs, or when the time
+ specified in timeout has elapsed. If a timeout is NULL, no timeout
+ occurs and the function will only be
+ called if a matching event occurs. The event in the
+ ev argument must be already initialized by event_assign() or event_new()
+ and may not be used
+ in calls to event_assign() until it is no longer pending.
+
+ If the event in the ev argument already has a scheduled timeout, calling
+ event_add() replaces the old timeout with the new one if tv is non-NULL.
+
+ @param ev an event struct initialized via event_assign() or event_new()
+ @param timeout the maximum amount of time to wait for the event, or NULL
+ to wait forever
+ @return 0 if successful, or -1 if an error occurred
+ @see event_del(), event_assign(), event_new()
+ */
+EVENT2_EXPORT_SYMBOL
+int event_add(struct event *ev, const struct timeval *timeout);
+
+/**
+ Remove a timer from a pending event without removing the event itself.
+
+ If the event has a scheduled timeout, this function unschedules it but
+ leaves the event otherwise pending.
+
+ @param ev an event struct initialized via event_assign() or event_new()
+ @return 0 on success, or -1 if an error occurred.
+*/
+EVENT2_EXPORT_SYMBOL
+int event_remove_timer(struct event *ev);
+
+/**
+ Remove an event from the set of monitored events.
+
+ The function event_del() will cancel the event in the argument ev. If the
+ event has already executed or has never been added the call will have no
+ effect.
+
+ @param ev an event struct to be removed from the working set
+ @return 0 if successful, or -1 if an error occurred
+ @see event_add()
+ */
+EVENT2_EXPORT_SYMBOL
+int event_del(struct event *);
+
+/**
+ As event_del(), but never blocks while the event's callback is running
+ in another thread, even if the event was constructed without the
+ EV_FINALIZE flag.
+ */
+EVENT2_EXPORT_SYMBOL
+int event_del_noblock(struct event *ev);
+/**
+ As event_del(), but always blocks while the event's callback is running
+ in another thread, even if the event was constructed with the
+ EV_FINALIZE flag.
+ */
+EVENT2_EXPORT_SYMBOL
+int event_del_block(struct event *ev);
+
+/**
+ Make an event active.
+
+ You can use this function on a pending or a non-pending event to make it
+ active, so that its callback will be run by event_base_dispatch() or
+ event_base_loop().
+
+ One common use in multithreaded programs is to wake the thread running
+ event_base_loop() from another thread.
+
+ @param ev an event to make active.
+ @param res a set of flags to pass to the event's callback.
+ @param ncalls an obsolete argument: this is ignored.
+ **/
+EVENT2_EXPORT_SYMBOL
+void event_active(struct event *ev, int res, short ncalls);
+
+/**
+ Checks if a specific event is pending or scheduled.
+
+ @param ev an event struct previously passed to event_add()
+ @param events the requested event type; any of EV_TIMEOUT|EV_READ|
+ EV_WRITE|EV_SIGNAL
+ @param tv if this field is not NULL, and the event has a timeout,
+ this field is set to hold the time at which the timeout will
+ expire.
+
+ @return true if the event is pending on any of the events in 'what', (that
+ is to say, it has been added), or 0 if the event is not added.
+ */
+EVENT2_EXPORT_SYMBOL
+int event_pending(const struct event *ev, short events, struct timeval *tv);
+
+/**
+ If called from within the callback for an event, returns that event.
+
+ The behavior of this function is not defined when called from outside the
+ callback function for an event.
+ */
+EVENT2_EXPORT_SYMBOL
+struct event *event_base_get_running_event(struct event_base *base);
+
+/**
+ Test if an event structure might be initialized.
+
+ The event_initialized() function can be used to check if an event has been
+ initialized.
+
+ Warning: This function is only useful for distinguishing a zeroed-out
+ piece of memory from an initialized event, it can easily be confused by
+ uninitialized memory. Thus, it should ONLY be used to distinguish an
+ initialized event from zero.
+
+ @param ev an event structure to be tested
+ @return 1 if the structure might be initialized, or 0 if it has not been
+ initialized
+ */
+EVENT2_EXPORT_SYMBOL
+int event_initialized(const struct event *ev);
+
+/**
+ Get the signal number assigned to a signal event
+*/
+#define event_get_signal(ev) ((int)event_get_fd(ev))
+
+/**
+ Get the socket or signal assigned to an event, or -1 if the event has
+ no socket.
+*/
+EVENT2_EXPORT_SYMBOL
+evutil_socket_t event_get_fd(const struct event *ev);
+
+/**
+ Get the event_base associated with an event.
+*/
+EVENT2_EXPORT_SYMBOL
+struct event_base *event_get_base(const struct event *ev);
+
+/**
+ Return the events (EV_READ, EV_WRITE, etc) assigned to an event.
+*/
+EVENT2_EXPORT_SYMBOL
+short event_get_events(const struct event *ev);
+
+/**
+ Return the callback assigned to an event.
+*/
+EVENT2_EXPORT_SYMBOL
+event_callback_fn event_get_callback(const struct event *ev);
+
+/**
+ Return the callback argument assigned to an event.
+*/
+EVENT2_EXPORT_SYMBOL
+void *event_get_callback_arg(const struct event *ev);
+
+/**
+ Return the priority of an event.
+ @see event_priority_init(), event_get_priority()
+*/
+EVENT2_EXPORT_SYMBOL
+int event_get_priority(const struct event *ev);
+
+/**
+ Extract _all_ of arguments given to construct a given event. The
+ event_base is copied into *base_out, the fd is copied into *fd_out, and so
+ on.
+
+ If any of the "_out" arguments is NULL, it will be ignored.
+ */
+EVENT2_EXPORT_SYMBOL
+void event_get_assignment(const struct event *event,
+ struct event_base **base_out, evutil_socket_t *fd_out, short *events_out,
+ event_callback_fn *callback_out, void **arg_out);
+
+/**
+ Return the size of struct event that the Libevent library was compiled
+ with.
+
+ This will be NO GREATER than sizeof(struct event) if you're running with
+ the same version of Libevent that your application was built with, but
+ otherwise might not.
+
+ Note that it might be SMALLER than sizeof(struct event) if some future
+ version of Libevent adds extra padding to the end of struct event.
+ We might do this to help ensure ABI-compatibility between different
+ versions of Libevent.
+ */
+EVENT2_EXPORT_SYMBOL
+size_t event_get_struct_event_size(void);
+
+/**
+ Get the Libevent version.
+
+ Note that this will give you the version of the library that you're
+ currently linked against, not the version of the headers that you've
+ compiled against.
+
+ @return a string containing the version number of Libevent
+*/
+EVENT2_EXPORT_SYMBOL
+const char *event_get_version(void);
+
+/**
+ Return a numeric representation of Libevent's version.
+
+ Note that this will give you the version of the library that you're
+ currently linked against, not the version of the headers you've used to
+ compile.
+
+ The format uses one byte each for the major, minor, and patchlevel parts of
+ the version number. The low-order byte is unused. For example, version
+ 2.0.1-alpha has a numeric representation of 0x02000100
+*/
+EVENT2_EXPORT_SYMBOL
+ev_uint32_t event_get_version_number(void);
+
+/** As event_get_version, but gives the version of Libevent's headers. */
+#define LIBEVENT_VERSION EVENT__VERSION
+/** As event_get_version_number, but gives the version number of Libevent's
+ * headers. */
+#define LIBEVENT_VERSION_NUMBER EVENT__NUMERIC_VERSION
+
+/** Largest number of priorities that Libevent can support. */
+#define EVENT_MAX_PRIORITIES 256
+/**
+ Set the number of different event priorities
+
+ By default Libevent schedules all active events with the same priority.
+ However, some time it is desirable to process some events with a higher
+ priority than others. For that reason, Libevent supports strict priority
+ queues. Active events with a lower priority are always processed before
+ events with a higher priority.
+
+ The number of different priorities can be set initially with the
+ event_base_priority_init() function. This function should be called
+ before the first call to event_base_dispatch(). The
+ event_priority_set() function can be used to assign a priority to an
+ event. By default, Libevent assigns the middle priority to all events
+ unless their priority is explicitly set.
+
+ Note that urgent-priority events can starve less-urgent events: after
+ running all urgent-priority callbacks, Libevent checks for more urgent
+ events again, before running less-urgent events. Less-urgent events
+ will not have their callbacks run until there are no events more urgent
+ than them that want to be active.
+
+ @param eb the event_base structure returned by event_base_new()
+ @param npriorities the maximum number of priorities
+ @return 0 if successful, or -1 if an error occurred
+ @see event_priority_set()
+ */
+EVENT2_EXPORT_SYMBOL
+int event_base_priority_init(struct event_base *, int);
+
+/**
+ Get the number of different event priorities.
+
+ @param eb the event_base structure returned by event_base_new()
+ @return Number of different event priorities
+ @see event_base_priority_init()
+*/
+EVENT2_EXPORT_SYMBOL
+int event_base_get_npriorities(struct event_base *eb);
+
+/**
+ Assign a priority to an event.
+
+ @param ev an event struct
+ @param priority the new priority to be assigned
+ @return 0 if successful, or -1 if an error occurred
+ @see event_priority_init(), event_get_priority()
+ */
+EVENT2_EXPORT_SYMBOL
+int event_priority_set(struct event *, int);
+
+/**
+ Prepare an event_base to use a large number of timeouts with the same
+ duration.
+
+ Libevent's default scheduling algorithm is optimized for having a large
+ number of timeouts with their durations more or less randomly
+ distributed. But if you have a large number of timeouts that all have
+ the same duration (for example, if you have a large number of
+ connections that all have a 10-second timeout), then you can improve
+ Libevent's performance by telling Libevent about it.
+
+ To do this, call this function with the common duration. It will return a
+ pointer to a different, opaque timeout value. (Don't depend on its actual
+ contents!) When you use this timeout value in event_add(), Libevent will
+ schedule the event more efficiently.
+
+ (This optimization probably will not be worthwhile until you have thousands
+ or tens of thousands of events with the same timeout.)
+ */
+EVENT2_EXPORT_SYMBOL
+const struct timeval *event_base_init_common_timeout(struct event_base *base,
+ const struct timeval *duration);
+
+#if !defined(EVENT__DISABLE_MM_REPLACEMENT) || defined(EVENT_IN_DOXYGEN_)
+/**
+ Override the functions that Libevent uses for memory management.
+
+ Usually, Libevent uses the standard libc functions malloc, realloc, and
+ free to allocate memory. Passing replacements for those functions to
+ event_set_mem_functions() overrides this behavior.
+
+ Note that all memory returned from Libevent will be allocated by the
+ replacement functions rather than by malloc() and realloc(). Thus, if you
+ have replaced those functions, it will not be appropriate to free() memory
+ that you get from Libevent. Instead, you must use the free_fn replacement
+ that you provided.
+
+ Note also that if you are going to call this function, you should do so
+ before any call to any Libevent function that does allocation.
+ Otherwise, those functions will allocate their memory using malloc(), but
+ then later free it using your provided free_fn.
+
+ @param malloc_fn A replacement for malloc.
+ @param realloc_fn A replacement for realloc
+ @param free_fn A replacement for free.
+ **/
+EVENT2_EXPORT_SYMBOL
+void event_set_mem_functions(
+ void *(*malloc_fn)(size_t sz),
+ void *(*realloc_fn)(void *ptr, size_t sz),
+ void (*free_fn)(void *ptr));
+/** This definition is present if Libevent was built with support for
+ event_set_mem_functions() */
+#define EVENT_SET_MEM_FUNCTIONS_IMPLEMENTED
+#endif
+
+/**
+ Writes a human-readable description of all inserted and/or active
+ events to a provided stdio stream.
+
+ This is intended for debugging; its format is not guaranteed to be the same
+ between libevent versions.
+
+ @param base An event_base on which to scan the events.
+ @param output A stdio file to write on.
+ */
+EVENT2_EXPORT_SYMBOL
+void event_base_dump_events(struct event_base *, FILE *);
+
+
+/**
+ Activates all pending events for the given fd and event mask.
+
+ This function activates pending events only. Events which have not been
+ added will not become active.
+
+ @param base the event_base on which to activate the events.
+ @param fd An fd to active events on.
+ @param events One or more of EV_{READ,WRITE,TIMEOUT}.
+ */
+EVENT2_EXPORT_SYMBOL
+void event_base_active_by_fd(struct event_base *base, evutil_socket_t fd, short events);
+
+/**
+ Activates all pending signals with a given signal number
+
+ This function activates pending events only. Events which have not been
+ added will not become active.
+
+ @param base the event_base on which to activate the events.
+ @param fd The signal to active events on.
+ */
+EVENT2_EXPORT_SYMBOL
+void event_base_active_by_signal(struct event_base *base, int sig);
+
+/**
+ * Callback for iterating events in an event base via event_base_foreach_event
+ */
+typedef int (*event_base_foreach_event_cb)(const struct event_base *, const struct event *, void *);
+
+/**
+ Iterate over all added or active events events in an event loop, and invoke
+ a given callback on each one.
+
+ The callback must not call any function that modifies the event base, that
+ modifies any event in the event base, or that adds or removes any event to
+ the event base. Doing so is unsupported and will lead to undefined
+ behavior -- likely, to crashes.
+
+ event_base_foreach_event() holds a lock on the event_base() for the whole
+ time it's running: slow callbacks are not advisable.
+
+ Note that Libevent adds some events of its own to make pieces of its
+ functionality work. You must not assume that the only events you'll
+ encounter will be the ones you added yourself.
+
+ The callback function must return 0 to continue iteration, or some other
+ integer to stop iterating.
+
+ @param base An event_base on which to scan the events.
+ @param fn A callback function to receive the events.
+ @param arg An argument passed to the callback function.
+ @return 0 if we iterated over every event, or the value returned by the
+ callback function if the loop exited early.
+*/
+EVENT2_EXPORT_SYMBOL
+int event_base_foreach_event(struct event_base *base, event_base_foreach_event_cb fn, void *arg);
+
+
+/** Sets 'tv' to the current time (as returned by gettimeofday()),
+ looking at the cached value in 'base' if possible, and calling
+ gettimeofday() or clock_gettime() as appropriate if there is no
+ cached time.
+
+ Generally, this value will only be cached while actually
+ processing event callbacks, and may be very inaccurate if your
+ callbacks take a long time to execute.
+
+ Returns 0 on success, negative on failure.
+ */
+EVENT2_EXPORT_SYMBOL
+int event_base_gettimeofday_cached(struct event_base *base,
+ struct timeval *tv);
+
+/** Update cached_tv in the 'base' to the current time
+ *
+ * You can use this function is useful for selectively increasing
+ * the accuracy of the cached time value in 'base' during callbacks
+ * that take a long time to execute.
+ *
+ * This function has no effect if the base is currently not in its
+ * event loop, or if timeval caching is disabled via
+ * EVENT_BASE_FLAG_NO_CACHE_TIME.
+ *
+ * @return 0 on success, -1 on failure
+ */
+EVENT2_EXPORT_SYMBOL
+int event_base_update_cache_time(struct event_base *base);
+
+/** Release up all globally-allocated resources allocated by Libevent.
+
+ This function does not free developer-controlled resources like
+ event_bases, events, bufferevents, listeners, and so on. It only releases
+ resources like global locks that there is no other way to free.
+
+ It is not actually necessary to call this function before exit: every
+ resource that it frees would be released anyway on exit. It mainly exists
+ so that resource-leak debugging tools don't see Libevent as holding
+ resources at exit.
+
+ You should only call this function when no other Libevent functions will
+ be invoked -- e.g., when cleanly exiting a program.
+ */
+EVENT2_EXPORT_SYMBOL
+void libevent_global_shutdown(void);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* EVENT2_EVENT_H_INCLUDED_ */
diff --git a/libevent/include/event2/event_compat.h b/libevent/include/event2/event_compat.h
new file mode 100644
index 0000000..5110175
--- /dev/null
+++ b/libevent/include/event2/event_compat.h
@@ -0,0 +1,230 @@
+/*
+ * Copyright (c) 2000-2007 Niels Provos <provos@citi.umich.edu>
+ * Copyright (c) 2007-2012 Niels Provos and Nick Mathewson
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ * derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+#ifndef EVENT2_EVENT_COMPAT_H_INCLUDED_
+#define EVENT2_EVENT_COMPAT_H_INCLUDED_
+
+/** @file event2/event_compat.h
+
+ Potentially non-threadsafe versions of the functions in event.h: provided
+ only for backwards compatibility.
+
+ In the oldest versions of Libevent, event_base was not a first-class
+ structure. Instead, there was a single event base that every function
+ manipulated. Later, when separate event bases were added, the old functions
+ that didn't take an event_base argument needed to work by manipulating the
+ "current" event base. This could lead to thread-safety issues, and obscure,
+ hard-to-diagnose bugs.
+
+ @deprecated All functions in this file are by definition deprecated.
+ */
+#include <event2/visibility.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include <event2/event-config.h>
+#ifdef EVENT__HAVE_SYS_TYPES_H
+#include <sys/types.h>
+#endif
+#ifdef EVENT__HAVE_SYS_TIME_H
+#include <sys/time.h>
+#endif
+
+/* For int types. */
+#include <event2/util.h>
+
+/**
+ Initialize the event API.
+
+ The event API needs to be initialized with event_init() before it can be
+ used. Sets the global current base that gets used for events that have no
+ base associated with them.
+
+ @deprecated This function is deprecated because it replaces the "current"
+ event_base, and is totally unsafe for multithreaded use. The replacement
+ is event_base_new().
+
+ @see event_base_set(), event_base_new()
+ */
+EVENT2_EXPORT_SYMBOL
+struct event_base *event_init(void);
+
+/**
+ Loop to process events.
+
+ Like event_base_dispatch(), but uses the "current" base.
+
+ @deprecated This function is deprecated because it is easily confused by
+ multiple calls to event_init(), and because it is not safe for
+ multithreaded use. The replacement is event_base_dispatch().
+
+ @see event_base_dispatch(), event_init()
+ */
+EVENT2_EXPORT_SYMBOL
+int event_dispatch(void);
+
+/**
+ Handle events.
+
+ This function behaves like event_base_loop(), but uses the "current" base
+
+ @deprecated This function is deprecated because it uses the event base from
+ the last call to event_init, and is therefore not safe for multithreaded
+ use. The replacement is event_base_loop().
+
+ @see event_base_loop(), event_init()
+*/
+EVENT2_EXPORT_SYMBOL
+int event_loop(int);
+
+
+/**
+ Exit the event loop after the specified time.
+
+ This function behaves like event_base_loopexit(), except that it uses the
+ "current" base.
+
+ @deprecated This function is deprecated because it uses the event base from
+ the last call to event_init, and is therefore not safe for multithreaded
+ use. The replacement is event_base_loopexit().
+
+ @see event_init, event_base_loopexit()
+ */
+EVENT2_EXPORT_SYMBOL
+int event_loopexit(const struct timeval *);
+
+
+/**
+ Abort the active event_loop() immediately.
+
+ This function behaves like event_base_loopbreakt(), except that it uses the
+ "current" base.
+
+ @deprecated This function is deprecated because it uses the event base from
+ the last call to event_init, and is therefore not safe for multithreaded
+ use. The replacement is event_base_loopbreak().
+
+ @see event_base_loopbreak(), event_init()
+ */
+EVENT2_EXPORT_SYMBOL
+int event_loopbreak(void);
+
+/**
+ Schedule a one-time event to occur.
+
+ @deprecated This function is obsolete, and has been replaced by
+ event_base_once(). Its use is deprecated because it relies on the
+ "current" base configured by event_init().
+
+ @see event_base_once()
+ */
+EVENT2_EXPORT_SYMBOL
+int event_once(evutil_socket_t , short,
+ void (*)(evutil_socket_t, short, void *), void *, const struct timeval *);
+
+
+/**
+ Get the kernel event notification mechanism used by Libevent.
+
+ @deprecated This function is obsolete, and has been replaced by
+ event_base_get_method(). Its use is deprecated because it relies on the
+ "current" base configured by event_init().
+
+ @see event_base_get_method()
+ */
+EVENT2_EXPORT_SYMBOL
+const char *event_get_method(void);
+
+
+/**
+ Set the number of different event priorities.
+
+ @deprecated This function is deprecated because it is easily confused by
+ multiple calls to event_init(), and because it is not safe for
+ multithreaded use. The replacement is event_base_priority_init().
+
+ @see event_base_priority_init()
+ */
+EVENT2_EXPORT_SYMBOL
+int event_priority_init(int);
+
+/**
+ Prepare an event structure to be added.
+
+ @deprecated event_set() is not recommended for new code, because it requires
+ a subsequent call to event_base_set() to be safe under most circumstances.
+ Use event_assign() or event_new() instead.
+ */
+EVENT2_EXPORT_SYMBOL
+void event_set(struct event *, evutil_socket_t, short, void (*)(evutil_socket_t, short, void *), void *);
+
+#define evtimer_set(ev, cb, arg) event_set((ev), -1, 0, (cb), (arg))
+#define evsignal_set(ev, x, cb, arg) \
+ event_set((ev), (x), EV_SIGNAL|EV_PERSIST, (cb), (arg))
+
+
+/**
+ @name timeout_* macros
+
+ @deprecated These macros are deprecated because their naming is inconsistent
+ with the rest of Libevent. Use the evtimer_* macros instead.
+ @{
+ */
+#define timeout_add(ev, tv) event_add((ev), (tv))
+#define timeout_set(ev, cb, arg) event_set((ev), -1, 0, (cb), (arg))
+#define timeout_del(ev) event_del(ev)
+#define timeout_pending(ev, tv) event_pending((ev), EV_TIMEOUT, (tv))
+#define timeout_initialized(ev) event_initialized(ev)
+/**@}*/
+
+/**
+ @name signal_* macros
+
+ @deprecated These macros are deprecated because their naming is inconsistent
+ with the rest of Libevent. Use the evsignal_* macros instead.
+ @{
+ */
+#define signal_add(ev, tv) event_add((ev), (tv))
+#define signal_set(ev, x, cb, arg) \
+ event_set((ev), (x), EV_SIGNAL|EV_PERSIST, (cb), (arg))
+#define signal_del(ev) event_del(ev)
+#define signal_pending(ev, tv) event_pending((ev), EV_SIGNAL, (tv))
+#define signal_initialized(ev) event_initialized(ev)
+/**@}*/
+
+#ifndef EVENT_FD
+/* These macros are obsolete; use event_get_fd and event_get_signal instead. */
+#define EVENT_FD(ev) ((int)event_get_fd(ev))
+#define EVENT_SIGNAL(ev) event_get_signal(ev)
+#endif
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* EVENT2_EVENT_COMPAT_H_INCLUDED_ */
diff --git a/libevent/include/event2/event_struct.h b/libevent/include/event2/event_struct.h
new file mode 100644
index 0000000..1c8b71b
--- /dev/null
+++ b/libevent/include/event2/event_struct.h
@@ -0,0 +1,180 @@
+/*
+ * Copyright (c) 2000-2007 Niels Provos <provos@citi.umich.edu>
+ * Copyright (c) 2007-2012 Niels Provos and Nick Mathewson
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ * derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+#ifndef EVENT2_EVENT_STRUCT_H_INCLUDED_
+#define EVENT2_EVENT_STRUCT_H_INCLUDED_
+
+/** @file event2/event_struct.h
+
+ Structures used by event.h. Using these structures directly WILL harm
+ forward compatibility: be careful.
+
+ No field declared in this file should be used directly in user code. Except
+ for historical reasons, these fields would not be exposed at all.
+ */
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include <event2/event-config.h>
+#ifdef EVENT__HAVE_SYS_TYPES_H
+#include <sys/types.h>
+#endif
+#ifdef EVENT__HAVE_SYS_TIME_H
+#include <sys/time.h>
+#endif
+
+/* For int types. */
+#include <event2/util.h>
+
+/* For evkeyvalq */
+#include <event2/keyvalq_struct.h>
+
+#define EVLIST_TIMEOUT 0x01
+#define EVLIST_INSERTED 0x02
+#define EVLIST_SIGNAL 0x04
+#define EVLIST_ACTIVE 0x08
+#define EVLIST_INTERNAL 0x10
+#define EVLIST_ACTIVE_LATER 0x20
+#define EVLIST_FINALIZING 0x40
+#define EVLIST_INIT 0x80
+
+#define EVLIST_ALL 0xff
+
+/* Fix so that people don't have to run with <sys/queue.h> */
+#ifndef TAILQ_ENTRY
+#define EVENT_DEFINED_TQENTRY_
+#define TAILQ_ENTRY(type) \
+struct { \
+ struct type *tqe_next; /* next element */ \
+ struct type **tqe_prev; /* address of previous next element */ \
+}
+#endif /* !TAILQ_ENTRY */
+
+#ifndef TAILQ_HEAD
+#define EVENT_DEFINED_TQHEAD_
+#define TAILQ_HEAD(name, type) \
+struct name { \
+ struct type *tqh_first; \
+ struct type **tqh_last; \
+}
+#endif
+
+/* Fix so that people don't have to run with <sys/queue.h> */
+#ifndef LIST_ENTRY
+#define EVENT_DEFINED_LISTENTRY_
+#define LIST_ENTRY(type) \
+struct { \
+ struct type *le_next; /* next element */ \
+ struct type **le_prev; /* address of previous next element */ \
+}
+#endif /* !LIST_ENTRY */
+
+#ifndef LIST_HEAD
+#define EVENT_DEFINED_LISTHEAD_
+#define LIST_HEAD(name, type) \
+struct name { \
+ struct type *lh_first; /* first element */ \
+ }
+#endif /* !LIST_HEAD */
+
+struct event;
+
+struct event_callback {
+ TAILQ_ENTRY(event_callback) evcb_active_next;
+ short evcb_flags;
+ ev_uint8_t evcb_pri; /* smaller numbers are higher priority */
+ ev_uint8_t evcb_closure;
+ /* allows us to adopt for different types of events */
+ union {
+ void (*evcb_callback)(evutil_socket_t, short, void *);
+ void (*evcb_selfcb)(struct event_callback *, void *);
+ void (*evcb_evfinalize)(struct event *, void *);
+ void (*evcb_cbfinalize)(struct event_callback *, void *);
+ } evcb_cb_union;
+ void *evcb_arg;
+};
+
+struct event_base;
+struct event {
+ struct event_callback ev_evcallback;
+
+ /* for managing timeouts */
+ union {
+ TAILQ_ENTRY(event) ev_next_with_common_timeout;
+ int min_heap_idx;
+ } ev_timeout_pos;
+ evutil_socket_t ev_fd;
+
+ struct event_base *ev_base;
+
+ union {
+ /* used for io events */
+ struct {
+ LIST_ENTRY (event) ev_io_next;
+ struct timeval ev_timeout;
+ } ev_io;
+
+ /* used by signal events */
+ struct {
+ LIST_ENTRY (event) ev_signal_next;
+ short ev_ncalls;
+ /* Allows deletes in callback */
+ short *ev_pncalls;
+ } ev_signal;
+ } ev_;
+
+ short ev_events;
+ short ev_res; /* result passed to event callback */
+ struct timeval ev_timeout;
+};
+
+TAILQ_HEAD (event_list, event);
+
+#ifdef EVENT_DEFINED_TQENTRY_
+#undef TAILQ_ENTRY
+#endif
+
+#ifdef EVENT_DEFINED_TQHEAD_
+#undef TAILQ_HEAD
+#endif
+
+LIST_HEAD (event_dlist, event);
+
+#ifdef EVENT_DEFINED_LISTENTRY_
+#undef LIST_ENTRY
+#endif
+
+#ifdef EVENT_DEFINED_LISTHEAD_
+#undef LIST_HEAD
+#endif
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* EVENT2_EVENT_STRUCT_H_INCLUDED_ */
diff --git a/libevent/include/event2/http.h b/libevent/include/event2/http.h
new file mode 100644
index 0000000..2a41303
--- /dev/null
+++ b/libevent/include/event2/http.h
@@ -0,0 +1,1192 @@
+/*
+ * Copyright (c) 2000-2007 Niels Provos <provos@citi.umich.edu>
+ * Copyright (c) 2007-2012 Niels Provos and Nick Mathewson
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ * derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+#ifndef EVENT2_HTTP_H_INCLUDED_
+#define EVENT2_HTTP_H_INCLUDED_
+
+/* For int types. */
+#include <event2/util.h>
+#include <event2/visibility.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* In case we haven't included the right headers yet. */
+struct evbuffer;
+struct event_base;
+struct bufferevent;
+struct evhttp_connection;
+
+/** @file event2/http.h
+ *
+ * Basic support for HTTP serving.
+ *
+ * As Libevent is a library for dealing with event notification and most
+ * interesting applications are networked today, I have often found the
+ * need to write HTTP code. The following prototypes and definitions provide
+ * an application with a minimal interface for making HTTP requests and for
+ * creating a very simple HTTP server.
+ */
+
+/* Response codes */
+#define HTTP_OK 200 /**< request completed ok */
+#define HTTP_NOCONTENT 204 /**< request does not have content */
+#define HTTP_MOVEPERM 301 /**< the uri moved permanently */
+#define HTTP_MOVETEMP 302 /**< the uri moved temporarily */
+#define HTTP_NOTMODIFIED 304 /**< page was not modified from last */
+#define HTTP_BADREQUEST 400 /**< invalid http request was made */
+#define HTTP_NOTFOUND 404 /**< could not find content for uri */
+#define HTTP_BADMETHOD 405 /**< method not allowed for this uri */
+#define HTTP_ENTITYTOOLARGE 413 /**< */
+#define HTTP_EXPECTATIONFAILED 417 /**< we can't handle this expectation */
+#define HTTP_INTERNAL 500 /**< internal error */
+#define HTTP_NOTIMPLEMENTED 501 /**< not implemented */
+#define HTTP_SERVUNAVAIL 503 /**< the server is not available */
+
+struct evhttp;
+struct evhttp_request;
+struct evkeyvalq;
+struct evhttp_bound_socket;
+struct evconnlistener;
+struct evdns_base;
+
+/**
+ * Create a new HTTP server.
+ *
+ * @param base (optional) the event base to receive the HTTP events
+ * @return a pointer to a newly initialized evhttp server structure or NULL
+ * on error
+ * @see evhttp_free()
+ */
+EVENT2_EXPORT_SYMBOL
+struct evhttp *evhttp_new(struct event_base *base);
+
+/**
+ * Binds an HTTP server on the specified address and port.
+ *
+ * Can be called multiple times to bind the same http server
+ * to multiple different ports.
+ *
+ * @param http a pointer to an evhttp object
+ * @param address a string containing the IP address to listen(2) on
+ * @param port the port number to listen on
+ * @return 0 on success, -1 on failure.
+ * @see evhttp_accept_socket()
+ */
+EVENT2_EXPORT_SYMBOL
+int evhttp_bind_socket(struct evhttp *http, const char *address, ev_uint16_t port);
+
+/**
+ * Like evhttp_bind_socket(), but returns a handle for referencing the socket.
+ *
+ * The returned pointer is not valid after \a http is freed.
+ *
+ * @param http a pointer to an evhttp object
+ * @param address a string containing the IP address to listen(2) on
+ * @param port the port number to listen on
+ * @return Handle for the socket on success, NULL on failure.
+ * @see evhttp_bind_socket(), evhttp_del_accept_socket()
+ */
+EVENT2_EXPORT_SYMBOL
+struct evhttp_bound_socket *evhttp_bind_socket_with_handle(struct evhttp *http, const char *address, ev_uint16_t port);
+
+/**
+ * Makes an HTTP server accept connections on the specified socket.
+ *
+ * This may be useful to create a socket and then fork multiple instances
+ * of an http server, or when a socket has been communicated via file
+ * descriptor passing in situations where an http servers does not have
+ * permissions to bind to a low-numbered port.
+ *
+ * Can be called multiple times to have the http server listen to
+ * multiple different sockets.
+ *
+ * @param http a pointer to an evhttp object
+ * @param fd a socket fd that is ready for accepting connections
+ * @return 0 on success, -1 on failure.
+ * @see evhttp_bind_socket()
+ */
+EVENT2_EXPORT_SYMBOL
+int evhttp_accept_socket(struct evhttp *http, evutil_socket_t fd);
+
+/**
+ * Like evhttp_accept_socket(), but returns a handle for referencing the socket.
+ *
+ * The returned pointer is not valid after \a http is freed.
+ *
+ * @param http a pointer to an evhttp object
+ * @param fd a socket fd that is ready for accepting connections
+ * @return Handle for the socket on success, NULL on failure.
+ * @see evhttp_accept_socket(), evhttp_del_accept_socket()
+ */
+EVENT2_EXPORT_SYMBOL
+struct evhttp_bound_socket *evhttp_accept_socket_with_handle(struct evhttp *http, evutil_socket_t fd);
+
+/**
+ * The most low-level evhttp_bind/accept method: takes an evconnlistener, and
+ * returns an evhttp_bound_socket. The listener will be freed when the bound
+ * socket is freed.
+ */
+EVENT2_EXPORT_SYMBOL
+struct evhttp_bound_socket *evhttp_bind_listener(struct evhttp *http, struct evconnlistener *listener);
+
+/**
+ * Return the listener used to implement a bound socket.
+ */
+EVENT2_EXPORT_SYMBOL
+struct evconnlistener *evhttp_bound_socket_get_listener(struct evhttp_bound_socket *bound);
+
+typedef void evhttp_bound_socket_foreach_fn(struct evhttp_bound_socket *, void *);
+/**
+ * Applies the function specified in the first argument to all
+ * evhttp_bound_sockets associated with "http". The user must not
+ * attempt to free or remove any connections, sockets or listeners
+ * in the callback "function".
+ *
+ * @param http pointer to an evhttp object
+ * @param function function to apply to every bound socket
+ * @param argument pointer value passed to function for every socket iterated
+ */
+EVENT2_EXPORT_SYMBOL
+void evhttp_foreach_bound_socket(struct evhttp *http, evhttp_bound_socket_foreach_fn *function, void *argument);
+
+/**
+ * Makes an HTTP server stop accepting connections on the specified socket
+ *
+ * This may be useful when a socket has been sent via file descriptor passing
+ * and is no longer needed by the current process.
+ *
+ * If you created this bound socket with evhttp_bind_socket_with_handle or
+ * evhttp_accept_socket_with_handle, this function closes the fd you provided.
+ * If you created this bound socket with evhttp_bind_listener, this function
+ * frees the listener you provided.
+ *
+ * \a bound_socket is an invalid pointer after this call returns.
+ *
+ * @param http a pointer to an evhttp object
+ * @param bound_socket a handle returned by evhttp_{bind,accept}_socket_with_handle
+ * @see evhttp_bind_socket_with_handle(), evhttp_accept_socket_with_handle()
+ */
+EVENT2_EXPORT_SYMBOL
+void evhttp_del_accept_socket(struct evhttp *http, struct evhttp_bound_socket *bound_socket);
+
+/**
+ * Get the raw file descriptor referenced by an evhttp_bound_socket.
+ *
+ * @param bound_socket a handle returned by evhttp_{bind,accept}_socket_with_handle
+ * @return the file descriptor used by the bound socket
+ * @see evhttp_bind_socket_with_handle(), evhttp_accept_socket_with_handle()
+ */
+EVENT2_EXPORT_SYMBOL
+evutil_socket_t evhttp_bound_socket_get_fd(struct evhttp_bound_socket *bound_socket);
+
+/**
+ * Free the previously created HTTP server.
+ *
+ * Works only if no requests are currently being served.
+ *
+ * @param http the evhttp server object to be freed
+ * @see evhttp_start()
+ */
+EVENT2_EXPORT_SYMBOL
+void evhttp_free(struct evhttp* http);
+
+/** XXX Document. */
+EVENT2_EXPORT_SYMBOL
+void evhttp_set_max_headers_size(struct evhttp* http, ev_ssize_t max_headers_size);
+/** XXX Document. */
+EVENT2_EXPORT_SYMBOL
+void evhttp_set_max_body_size(struct evhttp* http, ev_ssize_t max_body_size);
+
+/**
+ Set the value to use for the Content-Type header when none was provided. If
+ the content type string is NULL, the Content-Type header will not be
+ automatically added.
+
+ @param http the http server on which to set the default content type
+ @param content_type the value for the Content-Type header
+*/
+EVENT2_EXPORT_SYMBOL
+void evhttp_set_default_content_type(struct evhttp *http,
+ const char *content_type);
+
+/**
+ Sets the what HTTP methods are supported in requests accepted by this
+ server, and passed to user callbacks.
+
+ If not supported they will generate a "405 Method not allowed" response.
+
+ By default this includes the following methods: GET, POST, HEAD, PUT, DELETE
+
+ @param http the http server on which to set the methods
+ @param methods bit mask constructed from evhttp_cmd_type values
+*/
+EVENT2_EXPORT_SYMBOL
+void evhttp_set_allowed_methods(struct evhttp* http, ev_uint16_t methods);
+
+/**
+ Set a callback for a specified URI
+
+ @param http the http sever on which to set the callback
+ @param path the path for which to invoke the callback
+ @param cb the callback function that gets invoked on requesting path
+ @param cb_arg an additional context argument for the callback
+ @return 0 on success, -1 if the callback existed already, -2 on failure
+*/
+EVENT2_EXPORT_SYMBOL
+int evhttp_set_cb(struct evhttp *http, const char *path,
+ void (*cb)(struct evhttp_request *, void *), void *cb_arg);
+
+/** Removes the callback for a specified URI */
+EVENT2_EXPORT_SYMBOL
+int evhttp_del_cb(struct evhttp *, const char *);
+
+/**
+ Set a callback for all requests that are not caught by specific callbacks
+
+ Invokes the specified callback for all requests that do not match any of
+ the previously specified request paths. This is catchall for requests not
+ specifically configured with evhttp_set_cb().
+
+ @param http the evhttp server object for which to set the callback
+ @param cb the callback to invoke for any unmatched requests
+ @param arg an context argument for the callback
+*/
+EVENT2_EXPORT_SYMBOL
+void evhttp_set_gencb(struct evhttp *http,
+ void (*cb)(struct evhttp_request *, void *), void *arg);
+
+/**
+ Set a callback used to create new bufferevents for connections
+ to a given evhttp object.
+
+ You can use this to override the default bufferevent type -- for example,
+ to make this evhttp object use SSL bufferevents rather than unencrypted
+ ones.
+
+ New bufferevents must be allocated with no fd set on them.
+
+ @param http the evhttp server object for which to set the callback
+ @param cb the callback to invoke for incoming connections
+ @param arg an context argument for the callback
+ */
+EVENT2_EXPORT_SYMBOL
+void evhttp_set_bevcb(struct evhttp *http,
+ struct bufferevent *(*cb)(struct event_base *, void *), void *arg);
+
+/**
+ Adds a virtual host to the http server.
+
+ A virtual host is a newly initialized evhttp object that has request
+ callbacks set on it via evhttp_set_cb() or evhttp_set_gencb(). It
+ most not have any listing sockets associated with it.
+
+ If the virtual host has not been removed by the time that evhttp_free()
+ is called on the main http server, it will be automatically freed, too.
+
+ It is possible to have hierarchical vhosts. For example: A vhost
+ with the pattern *.example.com may have other vhosts with patterns
+ foo.example.com and bar.example.com associated with it.
+
+ @param http the evhttp object to which to add a virtual host
+ @param pattern the glob pattern against which the hostname is matched.
+ The match is case insensitive and follows otherwise regular shell
+ matching.
+ @param vhost the virtual host to add the regular http server.
+ @return 0 on success, -1 on failure
+ @see evhttp_remove_virtual_host()
+*/
+EVENT2_EXPORT_SYMBOL
+int evhttp_add_virtual_host(struct evhttp* http, const char *pattern,
+ struct evhttp* vhost);
+
+/**
+ Removes a virtual host from the http server.
+
+ @param http the evhttp object from which to remove the virtual host
+ @param vhost the virtual host to remove from the regular http server.
+ @return 0 on success, -1 on failure
+ @see evhttp_add_virtual_host()
+*/
+EVENT2_EXPORT_SYMBOL
+int evhttp_remove_virtual_host(struct evhttp* http, struct evhttp* vhost);
+
+/**
+ Add a server alias to an http object. The http object can be a virtual
+ host or the main server.
+
+ @param http the evhttp object
+ @param alias the alias to add
+ @see evhttp_add_remove_alias()
+*/
+EVENT2_EXPORT_SYMBOL
+int evhttp_add_server_alias(struct evhttp *http, const char *alias);
+
+/**
+ Remove a server alias from an http object.
+
+ @param http the evhttp object
+ @param alias the alias to remove
+ @see evhttp_add_server_alias()
+*/
+EVENT2_EXPORT_SYMBOL
+int evhttp_remove_server_alias(struct evhttp *http, const char *alias);
+
+/**
+ * Set the timeout for an HTTP request.
+ *
+ * @param http an evhttp object
+ * @param timeout_in_secs the timeout, in seconds
+ */
+EVENT2_EXPORT_SYMBOL
+void evhttp_set_timeout(struct evhttp *http, int timeout_in_secs);
+
+/**
+ * Set the timeout for an HTTP request.
+ *
+ * @param http an evhttp object
+ * @param tv the timeout, or NULL
+ */
+EVENT2_EXPORT_SYMBOL
+void evhttp_set_timeout_tv(struct evhttp *http, const struct timeval* tv);
+
+/* Read all the clients body, and only after this respond with an error if the
+ * clients body exceed max_body_size */
+#define EVHTTP_SERVER_LINGERING_CLOSE 0x0001
+/**
+ * Set connection flags for HTTP server.
+ *
+ * @see EVHTTP_SERVER_*
+ * @return 0 on success, otherwise non zero (for example if flag doesn't
+ * supported).
+ */
+EVENT2_EXPORT_SYMBOL
+int evhttp_set_flags(struct evhttp *http, int flags);
+
+/* Request/Response functionality */
+
+/**
+ * Send an HTML error message to the client.
+ *
+ * @param req a request object
+ * @param error the HTTP error code
+ * @param reason a brief explanation of the error. If this is NULL, we'll
+ * just use the standard meaning of the error code.
+ */
+EVENT2_EXPORT_SYMBOL
+void evhttp_send_error(struct evhttp_request *req, int error,
+ const char *reason);
+
+/**
+ * Send an HTML reply to the client.
+ *
+ * The body of the reply consists of the data in databuf. After calling
+ * evhttp_send_reply() databuf will be empty, but the buffer is still
+ * owned by the caller and needs to be deallocated by the caller if
+ * necessary.
+ *
+ * @param req a request object
+ * @param code the HTTP response code to send
+ * @param reason a brief message to send with the response code
+ * @param databuf the body of the response
+ */
+EVENT2_EXPORT_SYMBOL
+void evhttp_send_reply(struct evhttp_request *req, int code,
+ const char *reason, struct evbuffer *databuf);
+
+/* Low-level response interface, for streaming/chunked replies */
+
+/**
+ Initiate a reply that uses Transfer-Encoding chunked.
+
+ This allows the caller to stream the reply back to the client and is
+ useful when either not all of the reply data is immediately available
+ or when sending very large replies.
+
+ The caller needs to supply data chunks with evhttp_send_reply_chunk()
+ and complete the reply by calling evhttp_send_reply_end().
+
+ @param req a request object
+ @param code the HTTP response code to send
+ @param reason a brief message to send with the response code
+*/
+EVENT2_EXPORT_SYMBOL
+void evhttp_send_reply_start(struct evhttp_request *req, int code,
+ const char *reason);
+
+/**
+ Send another data chunk as part of an ongoing chunked reply.
+
+ The reply chunk consists of the data in databuf. After calling
+ evhttp_send_reply_chunk() databuf will be empty, but the buffer is
+ still owned by the caller and needs to be deallocated by the caller
+ if necessary.
+
+ @param req a request object
+ @param databuf the data chunk to send as part of the reply.
+*/
+EVENT2_EXPORT_SYMBOL
+void evhttp_send_reply_chunk(struct evhttp_request *req,
+ struct evbuffer *databuf);
+
+/**
+ Send another data chunk as part of an ongoing chunked reply.
+
+ The reply chunk consists of the data in databuf. After calling
+ evhttp_send_reply_chunk() databuf will be empty, but the buffer is
+ still owned by the caller and needs to be deallocated by the caller
+ if necessary.
+
+ @param req a request object
+ @param databuf the data chunk to send as part of the reply.
+ @param cb callback funcion
+ @param call back's argument.
+*/
+EVENT2_EXPORT_SYMBOL
+void evhttp_send_reply_chunk_with_cb(struct evhttp_request *, struct evbuffer *,
+ void (*cb)(struct evhttp_connection *, void *), void *arg);
+
+/**
+ Complete a chunked reply, freeing the request as appropriate.
+
+ @param req a request object
+*/
+EVENT2_EXPORT_SYMBOL
+void evhttp_send_reply_end(struct evhttp_request *req);
+
+/*
+ * Interfaces for making requests
+ */
+
+/** The different request types supported by evhttp. These are as specified
+ * in RFC2616, except for PATCH which is specified by RFC5789.
+ *
+ * By default, only some of these methods are accepted and passed to user
+ * callbacks; use evhttp_set_allowed_methods() to change which methods
+ * are allowed.
+ */
+enum evhttp_cmd_type {
+ EVHTTP_REQ_GET = 1 << 0,
+ EVHTTP_REQ_POST = 1 << 1,
+ EVHTTP_REQ_HEAD = 1 << 2,
+ EVHTTP_REQ_PUT = 1 << 3,
+ EVHTTP_REQ_DELETE = 1 << 4,
+ EVHTTP_REQ_OPTIONS = 1 << 5,
+ EVHTTP_REQ_TRACE = 1 << 6,
+ EVHTTP_REQ_CONNECT = 1 << 7,
+ EVHTTP_REQ_PATCH = 1 << 8
+};
+
+/** a request object can represent either a request or a reply */
+enum evhttp_request_kind { EVHTTP_REQUEST, EVHTTP_RESPONSE };
+
+/**
+ * Create and return a connection object that can be used to for making HTTP
+ * requests. The connection object tries to resolve address and establish the
+ * connection when it is given an http request object.
+ *
+ * @param base the event_base to use for handling the connection
+ * @param dnsbase the dns_base to use for resolving host names; if not
+ * specified host name resolution will block.
+ * @param bev a bufferevent to use for connecting to the server; if NULL, a
+ * socket-based bufferevent will be created. This buffrevent will be freed
+ * when the connection closes. It must have no fd set on it.
+ * @param address the address to which to connect
+ * @param port the port to connect to
+ * @return an evhttp_connection object that can be used for making requests or
+ * NULL on error
+ */
+EVENT2_EXPORT_SYMBOL
+struct evhttp_connection *evhttp_connection_base_bufferevent_new(
+ struct event_base *base, struct evdns_base *dnsbase, struct bufferevent* bev, const char *address, ev_uint16_t port);
+
+/**
+ * Return the bufferevent that an evhttp_connection is using.
+ */
+EVENT2_EXPORT_SYMBOL
+struct bufferevent* evhttp_connection_get_bufferevent(struct evhttp_connection *evcon);
+
+/**
+ * Return the HTTP server associated with this connection, or NULL.
+ */
+EVENT2_EXPORT_SYMBOL
+struct evhttp *evhttp_connection_get_server(struct evhttp_connection *evcon);
+
+/**
+ * Creates a new request object that needs to be filled in with the request
+ * parameters. The callback is executed when the request completed or an
+ * error occurred.
+ */
+EVENT2_EXPORT_SYMBOL
+struct evhttp_request *evhttp_request_new(
+ void (*cb)(struct evhttp_request *, void *), void *arg);
+
+/**
+ * Enable delivery of chunks to requestor.
+ * @param cb will be called after every read of data with the same argument
+ * as the completion callback. Will never be called on an empty
+ * response. May drain the input buffer; it will be drained
+ * automatically on return.
+ */
+EVENT2_EXPORT_SYMBOL
+void evhttp_request_set_chunked_cb(struct evhttp_request *,
+ void (*cb)(struct evhttp_request *, void *));
+
+/**
+ * Register callback for additional parsing of request headers.
+ * @param cb will be called after receiving and parsing the full header.
+ * It allows analyzing the header and possibly closing the connection
+ * by returning a value < 0.
+ */
+EVENT2_EXPORT_SYMBOL
+void evhttp_request_set_header_cb(struct evhttp_request *,
+ int (*cb)(struct evhttp_request *, void *));
+
+/**
+ * The different error types supported by evhttp
+ *
+ * @see evhttp_request_set_error_cb()
+ */
+enum evhttp_request_error {
+ /**
+ * Timeout reached, also @see evhttp_connection_set_timeout()
+ */
+ EVREQ_HTTP_TIMEOUT,
+ /**
+ * EOF reached
+ */
+ EVREQ_HTTP_EOF,
+ /**
+ * Error while reading header, or invalid header
+ */
+ EVREQ_HTTP_INVALID_HEADER,
+ /**
+ * Error encountered while reading or writing
+ */
+ EVREQ_HTTP_BUFFER_ERROR,
+ /**
+ * The evhttp_cancel_request() called on this request.
+ */
+ EVREQ_HTTP_REQUEST_CANCEL,
+ /**
+ * Body is greater then evhttp_connection_set_max_body_size()
+ */
+ EVREQ_HTTP_DATA_TOO_LONG
+};
+/**
+ * Set a callback for errors
+ * @see evhttp_request_error for error types.
+ *
+ * On error, both the error callback and the regular callback will be called,
+ * error callback is called before the regular callback.
+ **/
+EVENT2_EXPORT_SYMBOL
+void evhttp_request_set_error_cb(struct evhttp_request *,
+ void (*)(enum evhttp_request_error, void *));
+
+/**
+ * Set a callback to be called on request completion of evhttp_send_* function.
+ *
+ * The callback function will be called on the completion of the request after
+ * the output data has been written and before the evhttp_request object
+ * is destroyed. This can be useful for tracking resources associated with a
+ * request (ex: timing metrics).
+ *
+ * @param req a request object
+ * @param cb callback function that will be called on request completion
+ * @param cb_arg an additional context argument for the callback
+ */
+EVENT2_EXPORT_SYMBOL
+void evhttp_request_set_on_complete_cb(struct evhttp_request *req,
+ void (*cb)(struct evhttp_request *, void *), void *cb_arg);
+
+/** Frees the request object and removes associated events. */
+EVENT2_EXPORT_SYMBOL
+void evhttp_request_free(struct evhttp_request *req);
+
+/**
+ * Create and return a connection object that can be used to for making HTTP
+ * requests. The connection object tries to resolve address and establish the
+ * connection when it is given an http request object.
+ *
+ * @param base the event_base to use for handling the connection
+ * @param dnsbase the dns_base to use for resolving host names; if not
+ * specified host name resolution will block.
+ * @param address the address to which to connect
+ * @param port the port to connect to
+ * @return an evhttp_connection object that can be used for making requests or
+ * NULL on error
+ */
+EVENT2_EXPORT_SYMBOL
+struct evhttp_connection *evhttp_connection_base_new(
+ struct event_base *base, struct evdns_base *dnsbase,
+ const char *address, ev_uint16_t port);
+
+/**
+ * Set family hint for DNS requests.
+ */
+EVENT2_EXPORT_SYMBOL
+void evhttp_connection_set_family(struct evhttp_connection *evcon,
+ int family);
+
+/* reuse connection address on retry */
+#define EVHTTP_CON_REUSE_CONNECTED_ADDR 0x0008
+/* Try to read error, since server may already send and close
+ * connection, but if at that time we have some data to send then we
+ * can send get EPIPE and fail, while we can read that HTTP error. */
+#define EVHTTP_CON_READ_ON_WRITE_ERROR 0x0010
+/* @see EVHTTP_SERVER_LINGERING_CLOSE */
+#define EVHTTP_CON_LINGERING_CLOSE 0x0020
+/* Padding for public flags, @see EVHTTP_CON_* in http-internal.h */
+#define EVHTTP_CON_PUBLIC_FLAGS_END 0x100000
+/**
+ * Set connection flags.
+ *
+ * @see EVHTTP_CON_*
+ * @return 0 on success, otherwise non zero (for example if flag doesn't
+ * supported).
+ */
+EVENT2_EXPORT_SYMBOL
+int evhttp_connection_set_flags(struct evhttp_connection *evcon,
+ int flags);
+
+/** Takes ownership of the request object
+ *
+ * Can be used in a request callback to keep onto the request until
+ * evhttp_request_free() is explicitly called by the user.
+ */
+EVENT2_EXPORT_SYMBOL
+void evhttp_request_own(struct evhttp_request *req);
+
+/** Returns 1 if the request is owned by the user */
+EVENT2_EXPORT_SYMBOL
+int evhttp_request_is_owned(struct evhttp_request *req);
+
+/**
+ * Returns the connection object associated with the request or NULL
+ *
+ * The user needs to either free the request explicitly or call
+ * evhttp_send_reply_end().
+ */
+EVENT2_EXPORT_SYMBOL
+struct evhttp_connection *evhttp_request_get_connection(struct evhttp_request *req);
+
+/**
+ * Returns the underlying event_base for this connection
+ */
+EVENT2_EXPORT_SYMBOL
+struct event_base *evhttp_connection_get_base(struct evhttp_connection *req);
+
+EVENT2_EXPORT_SYMBOL
+void evhttp_connection_set_max_headers_size(struct evhttp_connection *evcon,
+ ev_ssize_t new_max_headers_size);
+
+EVENT2_EXPORT_SYMBOL
+void evhttp_connection_set_max_body_size(struct evhttp_connection* evcon,
+ ev_ssize_t new_max_body_size);
+
+/** Frees an http connection */
+EVENT2_EXPORT_SYMBOL
+void evhttp_connection_free(struct evhttp_connection *evcon);
+
+/** Disowns a given connection object
+ *
+ * Can be used to tell libevent to free the connection object after
+ * the last request has completed or failed.
+ */
+EVENT2_EXPORT_SYMBOL
+void evhttp_connection_free_on_completion(struct evhttp_connection *evcon);
+
+/** sets the ip address from which http connections are made */
+EVENT2_EXPORT_SYMBOL
+void evhttp_connection_set_local_address(struct evhttp_connection *evcon,
+ const char *address);
+
+/** sets the local port from which http connections are made */
+EVENT2_EXPORT_SYMBOL
+void evhttp_connection_set_local_port(struct evhttp_connection *evcon,
+ ev_uint16_t port);
+
+/** Sets the timeout in seconds for events related to this connection */
+EVENT2_EXPORT_SYMBOL
+void evhttp_connection_set_timeout(struct evhttp_connection *evcon,
+ int timeout_in_secs);
+
+/** Sets the timeout for events related to this connection. Takes a struct
+ * timeval. */
+EVENT2_EXPORT_SYMBOL
+void evhttp_connection_set_timeout_tv(struct evhttp_connection *evcon,
+ const struct timeval *tv);
+
+/** Sets the delay before retrying requests on this connection. This is only
+ * used if evhttp_connection_set_retries is used to make the number of retries
+ * at least one. Each retry after the first is twice as long as the one before
+ * it. */
+EVENT2_EXPORT_SYMBOL
+void evhttp_connection_set_initial_retry_tv(struct evhttp_connection *evcon,
+ const struct timeval *tv);
+
+/** Sets the retry limit for this connection - -1 repeats indefinitely */
+EVENT2_EXPORT_SYMBOL
+void evhttp_connection_set_retries(struct evhttp_connection *evcon,
+ int retry_max);
+
+/** Set a callback for connection close. */
+EVENT2_EXPORT_SYMBOL
+void evhttp_connection_set_closecb(struct evhttp_connection *evcon,
+ void (*)(struct evhttp_connection *, void *), void *);
+
+/** Get the remote address and port associated with this connection. */
+EVENT2_EXPORT_SYMBOL
+void evhttp_connection_get_peer(struct evhttp_connection *evcon,
+ char **address, ev_uint16_t *port);
+
+/** Get the remote address associated with this connection.
+ * extracted from getpeername() OR from nameserver.
+ *
+ * @return NULL if getpeername() return non success,
+ * or connection is not connected,
+ * otherwise it return pointer to struct sockaddr_storage */
+EVENT2_EXPORT_SYMBOL
+const struct sockaddr*
+evhttp_connection_get_addr(struct evhttp_connection *evcon);
+
+/**
+ Make an HTTP request over the specified connection.
+
+ The connection gets ownership of the request. On failure, the
+ request object is no longer valid as it has been freed.
+
+ @param evcon the evhttp_connection object over which to send the request
+ @param req the previously created and configured request object
+ @param type the request type EVHTTP_REQ_GET, EVHTTP_REQ_POST, etc.
+ @param uri the URI associated with the request
+ @return 0 on success, -1 on failure
+ @see evhttp_cancel_request()
+*/
+EVENT2_EXPORT_SYMBOL
+int evhttp_make_request(struct evhttp_connection *evcon,
+ struct evhttp_request *req,
+ enum evhttp_cmd_type type, const char *uri);
+
+/**
+ Cancels a pending HTTP request.
+
+ Cancels an ongoing HTTP request. The callback associated with this request
+ is not executed and the request object is freed. If the request is
+ currently being processed, e.g. it is ongoing, the corresponding
+ evhttp_connection object is going to get reset.
+
+ A request cannot be canceled if its callback has executed already. A request
+ may be canceled reentrantly from its chunked callback.
+
+ @param req the evhttp_request to cancel; req becomes invalid after this call.
+*/
+EVENT2_EXPORT_SYMBOL
+void evhttp_cancel_request(struct evhttp_request *req);
+
+/**
+ * A structure to hold a parsed URI or Relative-Ref conforming to RFC3986.
+ */
+struct evhttp_uri;
+
+/** Returns the request URI */
+EVENT2_EXPORT_SYMBOL
+const char *evhttp_request_get_uri(const struct evhttp_request *req);
+/** Returns the request URI (parsed) */
+EVENT2_EXPORT_SYMBOL
+const struct evhttp_uri *evhttp_request_get_evhttp_uri(const struct evhttp_request *req);
+/** Returns the request command */
+EVENT2_EXPORT_SYMBOL
+enum evhttp_cmd_type evhttp_request_get_command(const struct evhttp_request *req);
+
+EVENT2_EXPORT_SYMBOL
+int evhttp_request_get_response_code(const struct evhttp_request *req);
+EVENT2_EXPORT_SYMBOL
+const char * evhttp_request_get_response_code_line(const struct evhttp_request *req);
+
+/** Returns the input headers */
+EVENT2_EXPORT_SYMBOL
+struct evkeyvalq *evhttp_request_get_input_headers(struct evhttp_request *req);
+/** Returns the output headers */
+EVENT2_EXPORT_SYMBOL
+struct evkeyvalq *evhttp_request_get_output_headers(struct evhttp_request *req);
+/** Returns the input buffer */
+EVENT2_EXPORT_SYMBOL
+struct evbuffer *evhttp_request_get_input_buffer(struct evhttp_request *req);
+/** Returns the output buffer */
+EVENT2_EXPORT_SYMBOL
+struct evbuffer *evhttp_request_get_output_buffer(struct evhttp_request *req);
+/** Returns the host associated with the request. If a client sends an absolute
+ URI, the host part of that is preferred. Otherwise, the input headers are
+ searched for a Host: header. NULL is returned if no absolute URI or Host:
+ header is provided. */
+EVENT2_EXPORT_SYMBOL
+const char *evhttp_request_get_host(struct evhttp_request *req);
+
+/* Interfaces for dealing with HTTP headers */
+
+/**
+ Finds the value belonging to a header.
+
+ @param headers the evkeyvalq object in which to find the header
+ @param key the name of the header to find
+ @returns a pointer to the value for the header or NULL if the header
+ could not be found.
+ @see evhttp_add_header(), evhttp_remove_header()
+*/
+EVENT2_EXPORT_SYMBOL
+const char *evhttp_find_header(const struct evkeyvalq *headers,
+ const char *key);
+
+/**
+ Removes a header from a list of existing headers.
+
+ @param headers the evkeyvalq object from which to remove a header
+ @param key the name of the header to remove
+ @returns 0 if the header was removed, -1 otherwise.
+ @see evhttp_find_header(), evhttp_add_header()
+*/
+EVENT2_EXPORT_SYMBOL
+int evhttp_remove_header(struct evkeyvalq *headers, const char *key);
+
+/**
+ Adds a header to a list of existing headers.
+
+ @param headers the evkeyvalq object to which to add a header
+ @param key the name of the header
+ @param value the value belonging to the header
+ @returns 0 on success, -1 otherwise.
+ @see evhttp_find_header(), evhttp_clear_headers()
+*/
+EVENT2_EXPORT_SYMBOL
+int evhttp_add_header(struct evkeyvalq *headers, const char *key, const char *value);
+
+/**
+ Removes all headers from the header list.
+
+ @param headers the evkeyvalq object from which to remove all headers
+*/
+EVENT2_EXPORT_SYMBOL
+void evhttp_clear_headers(struct evkeyvalq *headers);
+
+/* Miscellaneous utility functions */
+
+
+/**
+ Helper function to encode a string for inclusion in a URI. All
+ characters are replaced by their hex-escaped (%22) equivalents,
+ except for characters explicitly unreserved by RFC3986 -- that is,
+ ASCII alphanumeric characters, hyphen, dot, underscore, and tilde.
+
+ The returned string must be freed by the caller.
+
+ @param str an unencoded string
+ @return a newly allocated URI-encoded string or NULL on failure
+ */
+EVENT2_EXPORT_SYMBOL
+char *evhttp_encode_uri(const char *str);
+
+/**
+ As evhttp_encode_uri, but if 'size' is nonnegative, treat the string
+ as being 'size' bytes long. This allows you to encode strings that
+ may contain 0-valued bytes.
+
+ The returned string must be freed by the caller.
+
+ @param str an unencoded string
+ @param size the length of the string to encode, or -1 if the string
+ is NUL-terminated
+ @param space_to_plus if true, space characters in 'str' are encoded
+ as +, not %20.
+ @return a newly allocate URI-encoded string, or NULL on failure.
+ */
+EVENT2_EXPORT_SYMBOL
+char *evhttp_uriencode(const char *str, ev_ssize_t size, int space_to_plus);
+
+/**
+ Helper function to sort of decode a URI-encoded string. Unlike
+ evhttp_uridecode, it decodes all plus characters that appear
+ _after_ the first question mark character, but no plusses that occur
+ before. This is not a good way to decode URIs in whole or in part.
+
+ The returned string must be freed by the caller
+
+ @deprecated This function is deprecated; you probably want to use
+ evhttp_uridecode instead.
+
+ @param uri an encoded URI
+ @return a newly allocated unencoded URI or NULL on failure
+ */
+EVENT2_EXPORT_SYMBOL
+char *evhttp_decode_uri(const char *uri);
+
+/**
+ Helper function to decode a URI-escaped string or HTTP parameter.
+
+ If 'decode_plus' is 1, then we decode the string as an HTTP parameter
+ value, and convert all plus ('+') characters to spaces. If
+ 'decode_plus' is 0, we leave all plus characters unchanged.
+
+ The returned string must be freed by the caller.
+
+ @param uri a URI-encode encoded URI
+ @param decode_plus determines whether we convert '+' to space.
+ @param size_out if size_out is not NULL, *size_out is set to the size of the
+ returned string
+ @return a newly allocated unencoded URI or NULL on failure
+ */
+EVENT2_EXPORT_SYMBOL
+char *evhttp_uridecode(const char *uri, int decode_plus,
+ size_t *size_out);
+
+/**
+ Helper function to parse out arguments in a query.
+
+ Parsing a URI like
+
+ http://foo.com/?q=test&s=some+thing
+
+ will result in two entries in the key value queue.
+
+ The first entry is: key="q", value="test"
+ The second entry is: key="s", value="some thing"
+
+ @deprecated This function is deprecated as of Libevent 2.0.9. Use
+ evhttp_uri_parse and evhttp_parse_query_str instead.
+
+ @param uri the request URI
+ @param headers the head of the evkeyval queue
+ @return 0 on success, -1 on failure
+ */
+EVENT2_EXPORT_SYMBOL
+int evhttp_parse_query(const char *uri, struct evkeyvalq *headers);
+
+/**
+ Helper function to parse out arguments from the query portion of an
+ HTTP URI.
+
+ Parsing a query string like
+
+ q=test&s=some+thing
+
+ will result in two entries in the key value queue.
+
+ The first entry is: key="q", value="test"
+ The second entry is: key="s", value="some thing"
+
+ @param query_parse the query portion of the URI
+ @param headers the head of the evkeyval queue
+ @return 0 on success, -1 on failure
+ */
+EVENT2_EXPORT_SYMBOL
+int evhttp_parse_query_str(const char *uri, struct evkeyvalq *headers);
+
+/**
+ * Escape HTML character entities in a string.
+ *
+ * Replaces <, >, ", ' and & with &lt;, &gt;, &quot;,
+ * &#039; and &amp; correspondingly.
+ *
+ * The returned string needs to be freed by the caller.
+ *
+ * @param html an unescaped HTML string
+ * @return an escaped HTML string or NULL on error
+ */
+EVENT2_EXPORT_SYMBOL
+char *evhttp_htmlescape(const char *html);
+
+/**
+ * Return a new empty evhttp_uri with no fields set.
+ */
+EVENT2_EXPORT_SYMBOL
+struct evhttp_uri *evhttp_uri_new(void);
+
+/**
+ * Changes the flags set on a given URI. See EVHTTP_URI_* for
+ * a list of flags.
+ **/
+EVENT2_EXPORT_SYMBOL
+void evhttp_uri_set_flags(struct evhttp_uri *uri, unsigned flags);
+
+/** Return the scheme of an evhttp_uri, or NULL if there is no scheme has
+ * been set and the evhttp_uri contains a Relative-Ref. */
+EVENT2_EXPORT_SYMBOL
+const char *evhttp_uri_get_scheme(const struct evhttp_uri *uri);
+/**
+ * Return the userinfo part of an evhttp_uri, or NULL if it has no userinfo
+ * set.
+ */
+EVENT2_EXPORT_SYMBOL
+const char *evhttp_uri_get_userinfo(const struct evhttp_uri *uri);
+/**
+ * Return the host part of an evhttp_uri, or NULL if it has no host set.
+ * The host may either be a regular hostname (conforming to the RFC 3986
+ * "regname" production), or an IPv4 address, or the empty string, or a
+ * bracketed IPv6 address, or a bracketed 'IP-Future' address.
+ *
+ * Note that having a NULL host means that the URI has no authority
+ * section, but having an empty-string host means that the URI has an
+ * authority section with no host part. For example,
+ * "mailto:user@example.com" has a host of NULL, but "file:///etc/motd"
+ * has a host of "".
+ */
+EVENT2_EXPORT_SYMBOL
+const char *evhttp_uri_get_host(const struct evhttp_uri *uri);
+/** Return the port part of an evhttp_uri, or -1 if there is no port set. */
+EVENT2_EXPORT_SYMBOL
+int evhttp_uri_get_port(const struct evhttp_uri *uri);
+/** Return the path part of an evhttp_uri, or NULL if it has no path set */
+EVENT2_EXPORT_SYMBOL
+const char *evhttp_uri_get_path(const struct evhttp_uri *uri);
+/** Return the query part of an evhttp_uri (excluding the leading "?"), or
+ * NULL if it has no query set */
+EVENT2_EXPORT_SYMBOL
+const char *evhttp_uri_get_query(const struct evhttp_uri *uri);
+/** Return the fragment part of an evhttp_uri (excluding the leading "#"),
+ * or NULL if it has no fragment set */
+EVENT2_EXPORT_SYMBOL
+const char *evhttp_uri_get_fragment(const struct evhttp_uri *uri);
+
+/** Set the scheme of an evhttp_uri, or clear the scheme if scheme==NULL.
+ * Returns 0 on success, -1 if scheme is not well-formed. */
+EVENT2_EXPORT_SYMBOL
+int evhttp_uri_set_scheme(struct evhttp_uri *uri, const char *scheme);
+/** Set the userinfo of an evhttp_uri, or clear the userinfo if userinfo==NULL.
+ * Returns 0 on success, -1 if userinfo is not well-formed. */
+EVENT2_EXPORT_SYMBOL
+int evhttp_uri_set_userinfo(struct evhttp_uri *uri, const char *userinfo);
+/** Set the host of an evhttp_uri, or clear the host if host==NULL.
+ * Returns 0 on success, -1 if host is not well-formed. */
+EVENT2_EXPORT_SYMBOL
+int evhttp_uri_set_host(struct evhttp_uri *uri, const char *host);
+/** Set the port of an evhttp_uri, or clear the port if port==-1.
+ * Returns 0 on success, -1 if port is not well-formed. */
+EVENT2_EXPORT_SYMBOL
+int evhttp_uri_set_port(struct evhttp_uri *uri, int port);
+/** Set the path of an evhttp_uri, or clear the path if path==NULL.
+ * Returns 0 on success, -1 if path is not well-formed. */
+EVENT2_EXPORT_SYMBOL
+int evhttp_uri_set_path(struct evhttp_uri *uri, const char *path);
+/** Set the query of an evhttp_uri, or clear the query if query==NULL.
+ * The query should not include a leading "?".
+ * Returns 0 on success, -1 if query is not well-formed. */
+EVENT2_EXPORT_SYMBOL
+int evhttp_uri_set_query(struct evhttp_uri *uri, const char *query);
+/** Set the fragment of an evhttp_uri, or clear the fragment if fragment==NULL.
+ * The fragment should not include a leading "#".
+ * Returns 0 on success, -1 if fragment is not well-formed. */
+EVENT2_EXPORT_SYMBOL
+int evhttp_uri_set_fragment(struct evhttp_uri *uri, const char *fragment);
+
+/**
+ * Helper function to parse a URI-Reference as specified by RFC3986.
+ *
+ * This function matches the URI-Reference production from RFC3986,
+ * which includes both URIs like
+ *
+ * scheme://[[userinfo]@]foo.com[:port]]/[path][?query][#fragment]
+ *
+ * and relative-refs like
+ *
+ * [path][?query][#fragment]
+ *
+ * Any optional elements portions not present in the original URI are
+ * left set to NULL in the resulting evhttp_uri. If no port is
+ * specified, the port is set to -1.
+ *
+ * Note that no decoding is performed on percent-escaped characters in
+ * the string; if you want to parse them, use evhttp_uridecode or
+ * evhttp_parse_query_str as appropriate.
+ *
+ * Note also that most URI schemes will have additional constraints that
+ * this function does not know about, and cannot check. For example,
+ * mailto://www.example.com/cgi-bin/fortune.pl is not a reasonable
+ * mailto url, http://www.example.com:99999/ is not a reasonable HTTP
+ * URL, and ftp:username@example.com is not a reasonable FTP URL.
+ * Nevertheless, all of these URLs conform to RFC3986, and this function
+ * accepts all of them as valid.
+ *
+ * @param source_uri the request URI
+ * @param flags Zero or more EVHTTP_URI_* flags to affect the behavior
+ * of the parser.
+ * @return uri container to hold parsed data, or NULL if there is error
+ * @see evhttp_uri_free()
+ */
+EVENT2_EXPORT_SYMBOL
+struct evhttp_uri *evhttp_uri_parse_with_flags(const char *source_uri,
+ unsigned flags);
+
+/** Tolerate URIs that do not conform to RFC3986.
+ *
+ * Unfortunately, some HTTP clients generate URIs that, according to RFC3986,
+ * are not conformant URIs. If you need to support these URIs, you can
+ * do so by passing this flag to evhttp_uri_parse_with_flags.
+ *
+ * Currently, these changes are:
+ * <ul>
+ * <li> Nonconformant URIs are allowed to contain otherwise unreasonable
+ * characters in their path, query, and fragment components.
+ * </ul>
+ */
+#define EVHTTP_URI_NONCONFORMANT 0x01
+
+/** Alias for evhttp_uri_parse_with_flags(source_uri, 0) */
+EVENT2_EXPORT_SYMBOL
+struct evhttp_uri *evhttp_uri_parse(const char *source_uri);
+
+/**
+ * Free all memory allocated for a parsed uri. Only use this for URIs
+ * generated by evhttp_uri_parse.
+ *
+ * @param uri container with parsed data
+ * @see evhttp_uri_parse()
+ */
+EVENT2_EXPORT_SYMBOL
+void evhttp_uri_free(struct evhttp_uri *uri);
+
+/**
+ * Join together the uri parts from parsed data to form a URI-Reference.
+ *
+ * Note that no escaping of reserved characters is done on the members
+ * of the evhttp_uri, so the generated string might not be a valid URI
+ * unless the members of evhttp_uri are themselves valid.
+ *
+ * @param uri container with parsed data
+ * @param buf destination buffer
+ * @param limit destination buffer size
+ * @return an joined uri as string or NULL on error
+ * @see evhttp_uri_parse()
+ */
+EVENT2_EXPORT_SYMBOL
+char *evhttp_uri_join(struct evhttp_uri *uri, char *buf, size_t limit);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* EVENT2_HTTP_H_INCLUDED_ */
diff --git a/libevent/include/event2/http_compat.h b/libevent/include/event2/http_compat.h
new file mode 100644
index 0000000..794a581
--- /dev/null
+++ b/libevent/include/event2/http_compat.h
@@ -0,0 +1,94 @@
+/*
+ * Copyright (c) 2000-2007 Niels Provos <provos@citi.umich.edu>
+ * Copyright (c) 2007-2012 Niels Provos and Nick Mathewson
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ * derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+#ifndef EVENT2_HTTP_COMPAT_H_INCLUDED_
+#define EVENT2_HTTP_COMPAT_H_INCLUDED_
+
+/** @file event2/http_compat.h
+
+ Potentially non-threadsafe versions of the functions in http.h: provided
+ only for backwards compatibility.
+
+ */
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include <event2/event-config.h>
+#ifdef EVENT__HAVE_SYS_TYPES_H
+#include <sys/types.h>
+#endif
+#ifdef EVENT__HAVE_SYS_TIME_H
+#include <sys/time.h>
+#endif
+
+/* For int types. */
+#include <event2/util.h>
+
+/**
+ * Start an HTTP server on the specified address and port
+ *
+ * @deprecated It does not allow an event base to be specified
+ *
+ * @param address the address to which the HTTP server should be bound
+ * @param port the port number on which the HTTP server should listen
+ * @return a pointer to a newly initialized evhttp server structure
+ * or NULL on error
+ */
+EVENT2_EXPORT_SYMBOL
+struct evhttp *evhttp_start(const char *address, ev_uint16_t port);
+
+/**
+ * A connection object that can be used to for making HTTP requests. The
+ * connection object tries to establish the connection when it is given an
+ * http request object.
+ *
+ * @deprecated It does not allow an event base to be specified
+ */
+EVENT2_EXPORT_SYMBOL
+struct evhttp_connection *evhttp_connection_new(
+ const char *address, ev_uint16_t port);
+
+/**
+ * Associates an event base with the connection - can only be called
+ * on a freshly created connection object that has not been used yet.
+ *
+ * @deprecated XXXX Why?
+ */
+EVENT2_EXPORT_SYMBOL
+void evhttp_connection_set_base(struct evhttp_connection *evcon,
+ struct event_base *base);
+
+
+/** Returns the request URI */
+#define evhttp_request_uri evhttp_request_get_uri
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* EVENT2_EVENT_COMPAT_H_INCLUDED_ */
diff --git a/libevent/include/event2/http_struct.h b/libevent/include/event2/http_struct.h
new file mode 100644
index 0000000..4bf5b1f
--- /dev/null
+++ b/libevent/include/event2/http_struct.h
@@ -0,0 +1,152 @@
+/*
+ * Copyright (c) 2000-2007 Niels Provos <provos@citi.umich.edu>
+ * Copyright (c) 2007-2012 Niels Provos and Nick Mathewson
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ * derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+#ifndef EVENT2_HTTP_STRUCT_H_INCLUDED_
+#define EVENT2_HTTP_STRUCT_H_INCLUDED_
+
+/** @file event2/http_struct.h
+
+ Data structures for http. Using these structures may hurt forward
+ compatibility with later versions of Libevent: be careful!
+
+ */
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include <event2/event-config.h>
+#ifdef EVENT__HAVE_SYS_TYPES_H
+#include <sys/types.h>
+#endif
+#ifdef EVENT__HAVE_SYS_TIME_H
+#include <sys/time.h>
+#endif
+
+/* For int types. */
+#include <event2/util.h>
+
+/**
+ * the request structure that a server receives.
+ * WARNING: expect this structure to change. I will try to provide
+ * reasonable accessors.
+ */
+struct evhttp_request {
+#if defined(TAILQ_ENTRY)
+ TAILQ_ENTRY(evhttp_request) next;
+#else
+struct {
+ struct evhttp_request *tqe_next;
+ struct evhttp_request **tqe_prev;
+} next;
+#endif
+
+ /* the connection object that this request belongs to */
+ struct evhttp_connection *evcon;
+ int flags;
+/** The request obj owns the evhttp connection and needs to free it */
+#define EVHTTP_REQ_OWN_CONNECTION 0x0001
+/** Request was made via a proxy */
+#define EVHTTP_PROXY_REQUEST 0x0002
+/** The request object is owned by the user; the user must free it */
+#define EVHTTP_USER_OWNED 0x0004
+/** The request will be used again upstack; freeing must be deferred */
+#define EVHTTP_REQ_DEFER_FREE 0x0008
+/** The request should be freed upstack */
+#define EVHTTP_REQ_NEEDS_FREE 0x0010
+
+ struct evkeyvalq *input_headers;
+ struct evkeyvalq *output_headers;
+
+ /* address of the remote host and the port connection came from */
+ char *remote_host;
+ ev_uint16_t remote_port;
+
+ /* cache of the hostname for evhttp_request_get_host */
+ char *host_cache;
+
+ enum evhttp_request_kind kind;
+ enum evhttp_cmd_type type;
+
+ size_t headers_size;
+ size_t body_size;
+
+ char *uri; /* uri after HTTP request was parsed */
+ struct evhttp_uri *uri_elems; /* uri elements */
+
+ char major; /* HTTP Major number */
+ char minor; /* HTTP Minor number */
+
+ int response_code; /* HTTP Response code */
+ char *response_code_line; /* Readable response */
+
+ struct evbuffer *input_buffer; /* read data */
+ ev_int64_t ntoread;
+ unsigned chunked:1, /* a chunked request */
+ userdone:1; /* the user has sent all data */
+
+ struct evbuffer *output_buffer; /* outgoing post or data */
+
+ /* Callback */
+ void (*cb)(struct evhttp_request *, void *);
+ void *cb_arg;
+
+ /*
+ * Chunked data callback - call for each completed chunk if
+ * specified. If not specified, all the data is delivered via
+ * the regular callback.
+ */
+ void (*chunk_cb)(struct evhttp_request *, void *);
+
+ /*
+ * Callback added for forked-daapd so they can collect ICY
+ * (shoutcast) metadata from the http header. If return
+ * int is negative the connection will be closed.
+ */
+ int (*header_cb)(struct evhttp_request *, void *);
+
+ /*
+ * Error callback - called when error is occured.
+ * @see evhttp_request_error for error types.
+ *
+ * @see evhttp_request_set_error_cb()
+ */
+ void (*error_cb)(enum evhttp_request_error, void *);
+
+ /*
+ * Send complete callback - called when the request is actually
+ * sent and completed.
+ */
+ void (*on_complete_cb)(struct evhttp_request *, void *);
+ void *on_complete_cb_arg;
+};
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* EVENT2_HTTP_STRUCT_H_INCLUDED_ */
+
diff --git a/libevent/include/event2/keyvalq_struct.h b/libevent/include/event2/keyvalq_struct.h
new file mode 100644
index 0000000..bffa54b
--- /dev/null
+++ b/libevent/include/event2/keyvalq_struct.h
@@ -0,0 +1,80 @@
+/*
+ * Copyright (c) 2000-2007 Niels Provos <provos@citi.umich.edu>
+ * Copyright (c) 2007-2012 Niels Provos and Nick Mathewson
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ * derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+#ifndef EVENT2_KEYVALQ_STRUCT_H_INCLUDED_
+#define EVENT2_KEYVALQ_STRUCT_H_INCLUDED_
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* Fix so that people don't have to run with <sys/queue.h> */
+/* XXXX This code is duplicated with event_struct.h */
+#ifndef TAILQ_ENTRY
+#define EVENT_DEFINED_TQENTRY_
+#define TAILQ_ENTRY(type) \
+struct { \
+ struct type *tqe_next; /* next element */ \
+ struct type **tqe_prev; /* address of previous next element */ \
+}
+#endif /* !TAILQ_ENTRY */
+
+#ifndef TAILQ_HEAD
+#define EVENT_DEFINED_TQHEAD_
+#define TAILQ_HEAD(name, type) \
+struct name { \
+ struct type *tqh_first; \
+ struct type **tqh_last; \
+}
+#endif
+
+/*
+ * Key-Value pairs. Can be used for HTTP headers but also for
+ * query argument parsing.
+ */
+struct evkeyval {
+ TAILQ_ENTRY(evkeyval) next;
+
+ char *key;
+ char *value;
+};
+
+TAILQ_HEAD (evkeyvalq, evkeyval);
+
+/* XXXX This code is duplicated with event_struct.h */
+#ifdef EVENT_DEFINED_TQENTRY_
+#undef TAILQ_ENTRY
+#endif
+
+#ifdef EVENT_DEFINED_TQHEAD_
+#undef TAILQ_HEAD
+#endif
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif
diff --git a/libevent/include/event2/listener.h b/libevent/include/event2/listener.h
new file mode 100644
index 0000000..789a27c
--- /dev/null
+++ b/libevent/include/event2/listener.h
@@ -0,0 +1,192 @@
+/*
+ * Copyright (c) 2000-2007 Niels Provos <provos@citi.umich.edu>
+ * Copyright (c) 2007-2012 Niels Provos and Nick Mathewson
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ * derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+#ifndef EVENT2_LISTENER_H_INCLUDED_
+#define EVENT2_LISTENER_H_INCLUDED_
+
+#include <event2/visibility.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include <event2/event.h>
+
+struct sockaddr;
+struct evconnlistener;
+
+/**
+ A callback that we invoke when a listener has a new connection.
+
+ @param listener The evconnlistener
+ @param fd The new file descriptor
+ @param addr The source address of the connection
+ @param socklen The length of addr
+ @param user_arg the pointer passed to evconnlistener_new()
+ */
+typedef void (*evconnlistener_cb)(struct evconnlistener *, evutil_socket_t, struct sockaddr *, int socklen, void *);
+
+/**
+ A callback that we invoke when a listener encounters a non-retriable error.
+
+ @param listener The evconnlistener
+ @param user_arg the pointer passed to evconnlistener_new()
+ */
+typedef void (*evconnlistener_errorcb)(struct evconnlistener *, void *);
+
+/** Flag: Indicates that we should not make incoming sockets nonblocking
+ * before passing them to the callback. */
+#define LEV_OPT_LEAVE_SOCKETS_BLOCKING (1u<<0)
+/** Flag: Indicates that freeing the listener should close the underlying
+ * socket. */
+#define LEV_OPT_CLOSE_ON_FREE (1u<<1)
+/** Flag: Indicates that we should set the close-on-exec flag, if possible */
+#define LEV_OPT_CLOSE_ON_EXEC (1u<<2)
+/** Flag: Indicates that we should disable the timeout (if any) between when
+ * this socket is closed and when we can listen again on the same port. */
+#define LEV_OPT_REUSEABLE (1u<<3)
+/** Flag: Indicates that the listener should be locked so it's safe to use
+ * from multiple threadcs at once. */
+#define LEV_OPT_THREADSAFE (1u<<4)
+/** Flag: Indicates that the listener should be created in disabled
+ * state. Use evconnlistener_enable() to enable it later. */
+#define LEV_OPT_DISABLED (1u<<5)
+/** Flag: Indicates that the listener should defer accept() until data is
+ * available, if possible. Ignored on platforms that do not support this.
+ *
+ * This option can help performance for protocols where the client transmits
+ * immediately after connecting. Do not use this option if your protocol
+ * _doesn't_ start out with the client transmitting data, since in that case
+ * this option will sometimes cause the kernel to never tell you about the
+ * connection.
+ *
+ * This option is only supported by evconnlistener_new_bind(): it can't
+ * work with evconnlistener_new_fd(), since the listener needs to be told
+ * to use the option before it is actually bound.
+ */
+#define LEV_OPT_DEFERRED_ACCEPT (1u<<6)
+/** Flag: Indicates that we ask to allow multiple servers (processes or
+ * threads) to bind to the same port if they each set the option.
+ *
+ * SO_REUSEPORT is what most people would expect SO_REUSEADDR to be, however
+ * SO_REUSEPORT does not imply SO_REUSEADDR.
+ *
+ * This is only available on Linux and kernel 3.9+
+ */
+#define LEV_OPT_REUSEABLE_PORT (1u<<7)
+/** Flag: Indicates that the listener wants to work only in IPv6 socket.
+ *
+ * According to RFC3493 and most Linux distributions, default value is to
+ * work in IPv4-mapped mode. If there is a requirement to bind same port
+ * on same ip addresses but different handlers for both IPv4 and IPv6,
+ * it is required to set IPV6_V6ONLY socket option to be sure that the
+ * code works as expected without affected by bindv6only sysctl setting in
+ * system.
+ *
+ * This socket option also supported by Windows.
+ */
+#define LEV_OPT_BIND_IPV6ONLY (1u<<8)
+
+/**
+ Allocate a new evconnlistener object to listen for incoming TCP connections
+ on a given file descriptor.
+
+ @param base The event base to associate the listener with.
+ @param cb A callback to be invoked when a new connection arrives. If the
+ callback is NULL, the listener will be treated as disabled until the
+ callback is set.
+ @param ptr A user-supplied pointer to give to the callback.
+ @param flags Any number of LEV_OPT_* flags
+ @param backlog Passed to the listen() call to determine the length of the
+ acceptable connection backlog. Set to -1 for a reasonable default.
+ Set to 0 if the socket is already listening.
+ @param fd The file descriptor to listen on. It must be a nonblocking
+ file descriptor, and it should already be bound to an appropriate
+ port and address.
+*/
+EVENT2_EXPORT_SYMBOL
+struct evconnlistener *evconnlistener_new(struct event_base *base,
+ evconnlistener_cb cb, void *ptr, unsigned flags, int backlog,
+ evutil_socket_t fd);
+/**
+ Allocate a new evconnlistener object to listen for incoming TCP connections
+ on a given address.
+
+ @param base The event base to associate the listener with.
+ @param cb A callback to be invoked when a new connection arrives. If the
+ callback is NULL, the listener will be treated as disabled until the
+ callback is set.
+ @param ptr A user-supplied pointer to give to the callback.
+ @param flags Any number of LEV_OPT_* flags
+ @param backlog Passed to the listen() call to determine the length of the
+ acceptable connection backlog. Set to -1 for a reasonable default.
+ @param addr The address to listen for connections on.
+ @param socklen The length of the address.
+ */
+EVENT2_EXPORT_SYMBOL
+struct evconnlistener *evconnlistener_new_bind(struct event_base *base,
+ evconnlistener_cb cb, void *ptr, unsigned flags, int backlog,
+ const struct sockaddr *sa, int socklen);
+/**
+ Disable and deallocate an evconnlistener.
+ */
+EVENT2_EXPORT_SYMBOL
+void evconnlistener_free(struct evconnlistener *lev);
+/**
+ Re-enable an evconnlistener that has been disabled.
+ */
+EVENT2_EXPORT_SYMBOL
+int evconnlistener_enable(struct evconnlistener *lev);
+/**
+ Stop listening for connections on an evconnlistener.
+ */
+EVENT2_EXPORT_SYMBOL
+int evconnlistener_disable(struct evconnlistener *lev);
+
+/** Return an evconnlistener's associated event_base. */
+EVENT2_EXPORT_SYMBOL
+struct event_base *evconnlistener_get_base(struct evconnlistener *lev);
+
+/** Return the socket that an evconnlistner is listening on. */
+EVENT2_EXPORT_SYMBOL
+evutil_socket_t evconnlistener_get_fd(struct evconnlistener *lev);
+
+/** Change the callback on the listener to cb and its user_data to arg.
+ */
+EVENT2_EXPORT_SYMBOL
+void evconnlistener_set_cb(struct evconnlistener *lev,
+ evconnlistener_cb cb, void *arg);
+
+/** Set an evconnlistener's error callback. */
+EVENT2_EXPORT_SYMBOL
+void evconnlistener_set_error_cb(struct evconnlistener *lev,
+ evconnlistener_errorcb errorcb);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif
diff --git a/libevent/include/event2/rpc.h b/libevent/include/event2/rpc.h
new file mode 100644
index 0000000..1bc31d5
--- /dev/null
+++ b/libevent/include/event2/rpc.h
@@ -0,0 +1,626 @@
+/*
+ * Copyright (c) 2006-2007 Niels Provos <provos@citi.umich.edu>
+ * Copyright (c) 2007-2012 Niels Provos and Nick Mathewson
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ * derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+#ifndef EVENT2_RPC_H_INCLUDED_
+#define EVENT2_RPC_H_INCLUDED_
+
+/* For int types. */
+#include <event2/util.h>
+#include <event2/visibility.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/** @file rpc.h
+ *
+ * This header files provides basic support for an RPC server and client.
+ *
+ * To support RPCs in a server, every supported RPC command needs to be
+ * defined and registered.
+ *
+ * EVRPC_HEADER(SendCommand, Request, Reply);
+ *
+ * SendCommand is the name of the RPC command.
+ * Request is the name of a structure generated by event_rpcgen.py.
+ * It contains all parameters relating to the SendCommand RPC. The
+ * server needs to fill in the Reply structure.
+ * Reply is the name of a structure generated by event_rpcgen.py. It
+ * contains the answer to the RPC.
+ *
+ * To register an RPC with an HTTP server, you need to first create an RPC
+ * base with:
+ *
+ * struct evrpc_base *base = evrpc_init(http);
+ *
+ * A specific RPC can then be registered with
+ *
+ * EVRPC_REGISTER(base, SendCommand, Request, Reply, FunctionCB, arg);
+ *
+ * when the server receives an appropriately formatted RPC, the user callback
+ * is invoked. The callback needs to fill in the reply structure.
+ *
+ * void FunctionCB(EVRPC_STRUCT(SendCommand)* rpc, void *arg);
+ *
+ * To send the reply, call EVRPC_REQUEST_DONE(rpc);
+ *
+ * See the regression test for an example.
+ */
+
+/**
+ Determines if the member has been set in the message
+
+ @param msg the message to inspect
+ @param member the member variable to test for presences
+ @return 1 if it's present or 0 otherwise.
+*/
+#define EVTAG_HAS(msg, member) \
+ ((msg)->member##_set == 1)
+
+#ifndef EVENT2_RPC_COMPAT_H_INCLUDED_
+
+/**
+ Assigns a value to the member in the message.
+
+ @param msg the message to which to assign a value
+ @param member the name of the member variable
+ @param value the value to assign
+*/
+#define EVTAG_ASSIGN(msg, member, value) \
+ (*(msg)->base->member##_assign)((msg), (value))
+/**
+ Assigns a value to the member in the message.
+
+ @param msg the message to which to assign a value
+ @param member the name of the member variable
+ @param value the value to assign
+ @param len the length of the value
+*/
+#define EVTAG_ASSIGN_WITH_LEN(msg, member, value, len) \
+ (*(msg)->base->member##_assign)((msg), (value), (len))
+/**
+ Returns the value for a member.
+
+ @param msg the message from which to get the value
+ @param member the name of the member variable
+ @param pvalue a pointer to the variable to hold the value
+ @return 0 on success, -1 otherwise.
+*/
+#define EVTAG_GET(msg, member, pvalue) \
+ (*(msg)->base->member##_get)((msg), (pvalue))
+/**
+ Returns the value for a member.
+
+ @param msg the message from which to get the value
+ @param member the name of the member variable
+ @param pvalue a pointer to the variable to hold the value
+ @param plen a pointer to the length of the value
+ @return 0 on success, -1 otherwise.
+*/
+#define EVTAG_GET_WITH_LEN(msg, member, pvalue, plen) \
+ (*(msg)->base->member##_get)((msg), (pvalue), (plen))
+
+#endif /* EVENT2_RPC_COMPAT_H_INCLUDED_ */
+
+/**
+ Adds a value to an array.
+*/
+#define EVTAG_ARRAY_ADD_VALUE(msg, member, value) \
+ (*(msg)->base->member##_add)((msg), (value))
+/**
+ Allocates a new entry in the array and returns it.
+*/
+#define EVTAG_ARRAY_ADD(msg, member) \
+ (*(msg)->base->member##_add)(msg)
+/**
+ Gets a variable at the specified offset from the array.
+*/
+#define EVTAG_ARRAY_GET(msg, member, offset, pvalue) \
+ (*(msg)->base->member##_get)((msg), (offset), (pvalue))
+/**
+ Returns the number of entries in the array.
+*/
+#define EVTAG_ARRAY_LEN(msg, member) ((msg)->member##_length)
+
+
+struct evbuffer;
+struct event_base;
+struct evrpc_req_generic;
+struct evrpc_request_wrapper;
+struct evrpc;
+
+/** The type of a specific RPC Message
+ *
+ * @param rpcname the name of the RPC message
+ */
+#define EVRPC_STRUCT(rpcname) struct evrpc_req__##rpcname
+
+struct evhttp_request;
+struct evrpc_status;
+struct evrpc_hook_meta;
+
+/** Creates the definitions and prototypes for an RPC
+ *
+ * You need to use EVRPC_HEADER to create structures and function prototypes
+ * needed by the server and client implementation. The structures have to be
+ * defined in an .rpc file and converted to source code via event_rpcgen.py
+ *
+ * @param rpcname the name of the RPC
+ * @param reqstruct the name of the RPC request structure
+ * @param replystruct the name of the RPC reply structure
+ * @see EVRPC_GENERATE()
+ */
+#define EVRPC_HEADER(rpcname, reqstruct, rplystruct) \
+EVRPC_STRUCT(rpcname) { \
+ struct evrpc_hook_meta *hook_meta; \
+ struct reqstruct* request; \
+ struct rplystruct* reply; \
+ struct evrpc* rpc; \
+ struct evhttp_request* http_req; \
+ struct evbuffer* rpc_data; \
+}; \
+EVENT2_EXPORT_SYMBOL \
+int evrpc_send_request_##rpcname(struct evrpc_pool *, \
+ struct reqstruct *, struct rplystruct *, \
+ void (*)(struct evrpc_status *, \
+ struct reqstruct *, struct rplystruct *, void *cbarg), \
+ void *);
+
+struct evrpc_pool;
+
+/** use EVRPC_GENERATE instead */
+EVENT2_EXPORT_SYMBOL
+struct evrpc_request_wrapper *evrpc_make_request_ctx(
+ struct evrpc_pool *pool, void *request, void *reply,
+ const char *rpcname,
+ void (*req_marshal)(struct evbuffer*, void *),
+ void (*rpl_clear)(void *),
+ int (*rpl_unmarshal)(void *, struct evbuffer *),
+ void (*cb)(struct evrpc_status *, void *, void *, void *),
+ void *cbarg);
+
+/** Creates a context structure that contains rpc specific information.
+ *
+ * EVRPC_MAKE_CTX is used to populate a RPC specific context that
+ * contains information about marshaling the RPC data types.
+ *
+ * @param rpcname the name of the RPC
+ * @param reqstruct the name of the RPC request structure
+ * @param replystruct the name of the RPC reply structure
+ * @param pool the evrpc_pool over which to make the request
+ * @param request a pointer to the RPC request structure object
+ * @param reply a pointer to the RPC reply structure object
+ * @param cb the callback function to call when the RPC has completed
+ * @param cbarg the argument to supply to the callback
+ */
+#define EVRPC_MAKE_CTX(rpcname, reqstruct, rplystruct, \
+ pool, request, reply, cb, cbarg) \
+ evrpc_make_request_ctx(pool, request, reply, \
+ #rpcname, \
+ (void (*)(struct evbuffer *, void *))reqstruct##_marshal, \
+ (void (*)(void *))rplystruct##_clear, \
+ (int (*)(void *, struct evbuffer *))rplystruct##_unmarshal, \
+ (void (*)(struct evrpc_status *, void *, void *, void *))cb, \
+ cbarg)
+
+/** Generates the code for receiving and sending an RPC message
+ *
+ * EVRPC_GENERATE is used to create the code corresponding to sending
+ * and receiving a particular RPC message
+ *
+ * @param rpcname the name of the RPC
+ * @param reqstruct the name of the RPC request structure
+ * @param replystruct the name of the RPC reply structure
+ * @see EVRPC_HEADER()
+ */
+#define EVRPC_GENERATE(rpcname, reqstruct, rplystruct) \
+ int evrpc_send_request_##rpcname(struct evrpc_pool *pool, \
+ struct reqstruct *request, struct rplystruct *reply, \
+ void (*cb)(struct evrpc_status *, \
+ struct reqstruct *, struct rplystruct *, void *cbarg), \
+ void *cbarg) { \
+ return evrpc_send_request_generic(pool, request, reply, \
+ (void (*)(struct evrpc_status *, void *, void *, void *))cb, \
+ cbarg, \
+ #rpcname, \
+ (void (*)(struct evbuffer *, void *))reqstruct##_marshal, \
+ (void (*)(void *))rplystruct##_clear, \
+ (int (*)(void *, struct evbuffer *))rplystruct##_unmarshal); \
+}
+
+/** Provides access to the HTTP request object underlying an RPC
+ *
+ * Access to the underlying http object; can be used to look at headers or
+ * for getting the remote ip address
+ *
+ * @param rpc_req the rpc request structure provided to the server callback
+ * @return an struct evhttp_request object that can be inspected for
+ * HTTP headers or sender information.
+ */
+#define EVRPC_REQUEST_HTTP(rpc_req) (rpc_req)->http_req
+
+/** completes the server response to an rpc request */
+EVENT2_EXPORT_SYMBOL
+void evrpc_request_done(struct evrpc_req_generic *req);
+
+/** accessors for request and reply */
+EVENT2_EXPORT_SYMBOL
+void *evrpc_get_request(struct evrpc_req_generic *req);
+EVENT2_EXPORT_SYMBOL
+void *evrpc_get_reply(struct evrpc_req_generic *req);
+
+/** Creates the reply to an RPC request
+ *
+ * EVRPC_REQUEST_DONE is used to answer a request; the reply is expected
+ * to have been filled in. The request and reply pointers become invalid
+ * after this call has finished.
+ *
+ * @param rpc_req the rpc request structure provided to the server callback
+ */
+#define EVRPC_REQUEST_DONE(rpc_req) do { \
+ struct evrpc_req_generic *req_ = (struct evrpc_req_generic *)(rpc_req); \
+ evrpc_request_done(req_); \
+} while (0)
+
+
+struct evrpc_base;
+struct evhttp;
+
+/* functions to start up the rpc system */
+
+/** Creates a new rpc base from which RPC requests can be received
+ *
+ * @param server a pointer to an existing HTTP server
+ * @return a newly allocated evrpc_base struct or NULL if an error occurred
+ * @see evrpc_free()
+ */
+EVENT2_EXPORT_SYMBOL
+struct evrpc_base *evrpc_init(struct evhttp *server);
+
+/**
+ * Frees the evrpc base
+ *
+ * For now, you are responsible for making sure that no rpcs are ongoing.
+ *
+ * @param base the evrpc_base object to be freed
+ * @see evrpc_init
+ */
+EVENT2_EXPORT_SYMBOL
+void evrpc_free(struct evrpc_base *base);
+
+/** register RPCs with the HTTP Server
+ *
+ * registers a new RPC with the HTTP server, each RPC needs to have
+ * a unique name under which it can be identified.
+ *
+ * @param base the evrpc_base structure in which the RPC should be
+ * registered.
+ * @param name the name of the RPC
+ * @param request the name of the RPC request structure
+ * @param reply the name of the RPC reply structure
+ * @param callback the callback that should be invoked when the RPC
+ * is received. The callback has the following prototype
+ * void (*callback)(EVRPC_STRUCT(Message)* rpc, void *arg)
+ * @param cbarg an additional parameter that can be passed to the callback.
+ * The parameter can be used to carry around state.
+ */
+#define EVRPC_REGISTER(base, name, request, reply, callback, cbarg) \
+ evrpc_register_generic(base, #name, \
+ (void (*)(struct evrpc_req_generic *, void *))callback, cbarg, \
+ (void *(*)(void *))request##_new_with_arg, NULL, \
+ (void (*)(void *))request##_free, \
+ (int (*)(void *, struct evbuffer *))request##_unmarshal, \
+ (void *(*)(void *))reply##_new_with_arg, NULL, \
+ (void (*)(void *))reply##_free, \
+ (int (*)(void *))reply##_complete, \
+ (void (*)(struct evbuffer *, void *))reply##_marshal)
+
+/**
+ Low level function for registering an RPC with a server.
+
+ Use EVRPC_REGISTER() instead.
+
+ @see EVRPC_REGISTER()
+*/
+EVENT2_EXPORT_SYMBOL
+int evrpc_register_rpc(struct evrpc_base *, struct evrpc *,
+ void (*)(struct evrpc_req_generic*, void *), void *);
+
+/**
+ * Unregisters an already registered RPC
+ *
+ * @param base the evrpc_base object from which to unregister an RPC
+ * @param name the name of the rpc to unregister
+ * @return -1 on error or 0 when successful.
+ * @see EVRPC_REGISTER()
+ */
+#define EVRPC_UNREGISTER(base, name) evrpc_unregister_rpc((base), #name)
+
+EVENT2_EXPORT_SYMBOL
+int evrpc_unregister_rpc(struct evrpc_base *base, const char *name);
+
+/*
+ * Client-side RPC support
+ */
+
+struct evhttp_connection;
+struct evrpc_status;
+
+/** launches an RPC and sends it to the server
+ *
+ * EVRPC_MAKE_REQUEST() is used by the client to send an RPC to the server.
+ *
+ * @param name the name of the RPC
+ * @param pool the evrpc_pool that contains the connection objects over which
+ * the request should be sent.
+ * @param request a pointer to the RPC request structure - it contains the
+ * data to be sent to the server.
+ * @param reply a pointer to the RPC reply structure. It is going to be filled
+ * if the request was answered successfully
+ * @param cb the callback to invoke when the RPC request has been answered
+ * @param cbarg an additional argument to be passed to the client
+ * @return 0 on success, -1 on failure
+ */
+#define EVRPC_MAKE_REQUEST(name, pool, request, reply, cb, cbarg) \
+ evrpc_send_request_##name((pool), (request), (reply), (cb), (cbarg))
+
+/**
+ Makes an RPC request based on the provided context.
+
+ This is a low-level function and should not be used directly
+ unless a custom context object is provided. Use EVRPC_MAKE_REQUEST()
+ instead.
+
+ @param ctx a context from EVRPC_MAKE_CTX()
+ @returns 0 on success, -1 otherwise.
+ @see EVRPC_MAKE_REQUEST(), EVRPC_MAKE_CTX()
+*/
+EVENT2_EXPORT_SYMBOL
+int evrpc_make_request(struct evrpc_request_wrapper *ctx);
+
+/** creates an rpc connection pool
+ *
+ * a pool has a number of connections associated with it.
+ * rpc requests are always made via a pool.
+ *
+ * @param base a pointer to an struct event_based object; can be left NULL
+ * in singled-threaded applications
+ * @return a newly allocated struct evrpc_pool object or NULL if an error
+ * occurred
+ * @see evrpc_pool_free()
+ */
+EVENT2_EXPORT_SYMBOL
+struct evrpc_pool *evrpc_pool_new(struct event_base *base);
+/** frees an rpc connection pool
+ *
+ * @param pool a pointer to an evrpc_pool allocated via evrpc_pool_new()
+ * @see evrpc_pool_new()
+ */
+EVENT2_EXPORT_SYMBOL
+void evrpc_pool_free(struct evrpc_pool *pool);
+
+/**
+ * Adds a connection over which rpc can be dispatched to the pool.
+ *
+ * The connection object must have been newly created.
+ *
+ * @param pool the pool to which to add the connection
+ * @param evcon the connection to add to the pool.
+ */
+EVENT2_EXPORT_SYMBOL
+void evrpc_pool_add_connection(struct evrpc_pool *pool,
+ struct evhttp_connection *evcon);
+
+/**
+ * Removes a connection from the pool.
+ *
+ * The connection object must have been newly created.
+ *
+ * @param pool the pool from which to remove the connection
+ * @param evcon the connection to remove from the pool.
+ */
+EVENT2_EXPORT_SYMBOL
+void evrpc_pool_remove_connection(struct evrpc_pool *pool,
+ struct evhttp_connection *evcon);
+
+/**
+ * Sets the timeout in secs after which a request has to complete. The
+ * RPC is completely aborted if it does not complete by then. Setting
+ * the timeout to 0 means that it never timeouts and can be used to
+ * implement callback type RPCs.
+ *
+ * Any connection already in the pool will be updated with the new
+ * timeout. Connections added to the pool after set_timeout has be
+ * called receive the pool timeout only if no timeout has been set
+ * for the connection itself.
+ *
+ * @param pool a pointer to a struct evrpc_pool object
+ * @param timeout_in_secs the number of seconds after which a request should
+ * timeout and a failure be returned to the callback.
+ */
+EVENT2_EXPORT_SYMBOL
+void evrpc_pool_set_timeout(struct evrpc_pool *pool, int timeout_in_secs);
+
+/**
+ * Hooks for changing the input and output of RPCs; this can be used to
+ * implement compression, authentication, encryption, ...
+ */
+
+enum EVRPC_HOOK_TYPE {
+ EVRPC_INPUT, /**< apply the function to an input hook */
+ EVRPC_OUTPUT /**< apply the function to an output hook */
+};
+
+#ifndef _WIN32
+/** Deprecated alias for EVRPC_INPUT. Not available on windows, where it
+ * conflicts with platform headers. */
+#define INPUT EVRPC_INPUT
+/** Deprecated alias for EVRPC_OUTPUT. Not available on windows, where it
+ * conflicts with platform headers. */
+#define OUTPUT EVRPC_OUTPUT
+#endif
+
+/**
+ * Return value from hook processing functions
+ */
+
+enum EVRPC_HOOK_RESULT {
+ EVRPC_TERMINATE = -1, /**< indicates the rpc should be terminated */
+ EVRPC_CONTINUE = 0, /**< continue processing the rpc */
+ EVRPC_PAUSE = 1 /**< pause processing request until resumed */
+};
+
+/** adds a processing hook to either an rpc base or rpc pool
+ *
+ * If a hook returns TERMINATE, the processing is aborted. On CONTINUE,
+ * the request is immediately processed after the hook returns. If the
+ * hook returns PAUSE, request processing stops until evrpc_resume_request()
+ * has been called.
+ *
+ * The add functions return handles that can be used for removing hooks.
+ *
+ * @param vbase a pointer to either struct evrpc_base or struct evrpc_pool
+ * @param hook_type either INPUT or OUTPUT
+ * @param cb the callback to call when the hook is activated
+ * @param cb_arg an additional argument for the callback
+ * @return a handle to the hook so it can be removed later
+ * @see evrpc_remove_hook()
+ */
+EVENT2_EXPORT_SYMBOL
+void *evrpc_add_hook(void *vbase,
+ enum EVRPC_HOOK_TYPE hook_type,
+ int (*cb)(void *, struct evhttp_request *, struct evbuffer *, void *),
+ void *cb_arg);
+
+/** removes a previously added hook
+ *
+ * @param vbase a pointer to either struct evrpc_base or struct evrpc_pool
+ * @param hook_type either INPUT or OUTPUT
+ * @param handle a handle returned by evrpc_add_hook()
+ * @return 1 on success or 0 on failure
+ * @see evrpc_add_hook()
+ */
+EVENT2_EXPORT_SYMBOL
+int evrpc_remove_hook(void *vbase,
+ enum EVRPC_HOOK_TYPE hook_type,
+ void *handle);
+
+/** resume a paused request
+ *
+ * @param vbase a pointer to either struct evrpc_base or struct evrpc_pool
+ * @param ctx the context pointer provided to the original hook call
+ */
+EVENT2_EXPORT_SYMBOL
+int evrpc_resume_request(void *vbase, void *ctx, enum EVRPC_HOOK_RESULT res);
+
+/** adds meta data to request
+ *
+ * evrpc_hook_add_meta() allows hooks to add meta data to a request. for
+ * a client request, the meta data can be inserted by an outgoing request hook
+ * and retrieved by the incoming request hook.
+ *
+ * @param ctx the context provided to the hook call
+ * @param key a NUL-terminated c-string
+ * @param data the data to be associated with the key
+ * @param data_size the size of the data
+ */
+EVENT2_EXPORT_SYMBOL
+void evrpc_hook_add_meta(void *ctx, const char *key,
+ const void *data, size_t data_size);
+
+/** retrieves meta data previously associated
+ *
+ * evrpc_hook_find_meta() can be used to retrieve meta data associated to a
+ * request by a previous hook.
+ * @param ctx the context provided to the hook call
+ * @param key a NUL-terminated c-string
+ * @param data pointer to a data pointer that will contain the retrieved data
+ * @param data_size pointer to the size of the data
+ * @return 0 on success or -1 on failure
+ */
+EVENT2_EXPORT_SYMBOL
+int evrpc_hook_find_meta(void *ctx, const char *key,
+ void **data, size_t *data_size);
+
+/**
+ * returns the connection object associated with the request
+ *
+ * @param ctx the context provided to the hook call
+ * @return a pointer to the evhttp_connection object or NULL if an error
+ * occurred
+ */
+EVENT2_EXPORT_SYMBOL
+struct evhttp_connection *evrpc_hook_get_connection(void *ctx);
+
+/**
+ Function for sending a generic RPC request.
+
+ Do not call this function directly, use EVRPC_MAKE_REQUEST() instead.
+
+ @see EVRPC_MAKE_REQUEST()
+ */
+EVENT2_EXPORT_SYMBOL
+int evrpc_send_request_generic(struct evrpc_pool *pool,
+ void *request, void *reply,
+ void (*cb)(struct evrpc_status *, void *, void *, void *),
+ void *cb_arg,
+ const char *rpcname,
+ void (*req_marshal)(struct evbuffer *, void *),
+ void (*rpl_clear)(void *),
+ int (*rpl_unmarshal)(void *, struct evbuffer *));
+
+/**
+ Function for registering a generic RPC with the RPC base.
+
+ Do not call this function directly, use EVRPC_REGISTER() instead.
+
+ @see EVRPC_REGISTER()
+ */
+EVENT2_EXPORT_SYMBOL
+int evrpc_register_generic(struct evrpc_base *base, const char *name,
+ void (*callback)(struct evrpc_req_generic *, void *), void *cbarg,
+ void *(*req_new)(void *), void *req_new_arg, void (*req_free)(void *),
+ int (*req_unmarshal)(void *, struct evbuffer *),
+ void *(*rpl_new)(void *), void *rpl_new_arg, void (*rpl_free)(void *),
+ int (*rpl_complete)(void *),
+ void (*rpl_marshal)(struct evbuffer *, void *));
+
+/** accessors for obscure and undocumented functionality */
+EVENT2_EXPORT_SYMBOL
+struct evrpc_pool* evrpc_request_get_pool(struct evrpc_request_wrapper *ctx);
+EVENT2_EXPORT_SYMBOL
+void evrpc_request_set_pool(struct evrpc_request_wrapper *ctx,
+ struct evrpc_pool *pool);
+EVENT2_EXPORT_SYMBOL
+void evrpc_request_set_cb(struct evrpc_request_wrapper *ctx,
+ void (*cb)(struct evrpc_status*, void *request, void *reply, void *arg),
+ void *cb_arg);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* EVENT2_RPC_H_INCLUDED_ */
diff --git a/libevent/include/event2/rpc_compat.h b/libevent/include/event2/rpc_compat.h
new file mode 100644
index 0000000..8d8334d
--- /dev/null
+++ b/libevent/include/event2/rpc_compat.h
@@ -0,0 +1,61 @@
+/*
+ * Copyright (c) 2006-2007 Niels Provos <provos@citi.umich.edu>
+ * Copyright (c) 2007-2012 Niels Provos and Nick Mathewson
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ * derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+#ifndef EVENT2_RPC_COMPAT_H_INCLUDED_
+#define EVENT2_RPC_COMPAT_H_INCLUDED_
+
+/** @file event2/rpc_compat.h
+
+ Deprecated versions of the functions in rpc.h: provided only for
+ backwards compatibility.
+
+ */
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/** backwards compatible accessors that work only with gcc */
+#if defined(__GNUC__) && !defined(__STRICT_ANSI__)
+
+#undef EVTAG_ASSIGN
+#undef EVTAG_GET
+#undef EVTAG_ADD
+
+#define EVTAG_ASSIGN(msg, member, args...) \
+ (*(msg)->base->member##_assign)(msg, ## args)
+#define EVTAG_GET(msg, member, args...) \
+ (*(msg)->base->member##_get)(msg, ## args)
+#define EVTAG_ADD(msg, member, args...) \
+ (*(msg)->base->member##_add)(msg, ## args)
+#endif
+#define EVTAG_LEN(msg, member) ((msg)->member##_length)
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* EVENT2_EVENT_COMPAT_H_INCLUDED_ */
diff --git a/libevent/include/event2/rpc_struct.h b/libevent/include/event2/rpc_struct.h
new file mode 100644
index 0000000..f3cb460
--- /dev/null
+++ b/libevent/include/event2/rpc_struct.h
@@ -0,0 +1,114 @@
+/*
+ * Copyright (c) 2006-2007 Niels Provos <provos@citi.umich.edu>
+ * Copyright (c) 2007-2012 Niels Provos and Nick Mathewson
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ * derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+#ifndef EVENT2_RPC_STRUCT_H_INCLUDED_
+#define EVENT2_RPC_STRUCT_H_INCLUDED_
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/** @file event2/rpc_struct.h
+
+ Structures used by rpc.h. Using these structures directly may harm
+ forward compatibility: be careful!
+
+ */
+
+/* Fix so that people don't have to run with <sys/queue.h> */
+#ifndef TAILQ_ENTRY
+#define EVENT_DEFINED_TQENTRY_
+#define TAILQ_ENTRY(type) \
+struct { \
+ struct type *tqe_next; /* next element */ \
+ struct type **tqe_prev; /* address of previous next element */ \
+}
+#endif /* !TAILQ_ENTRY */
+
+/**
+ * provides information about the completed RPC request.
+ */
+struct evrpc_status {
+#define EVRPC_STATUS_ERR_NONE 0
+#define EVRPC_STATUS_ERR_TIMEOUT 1
+#define EVRPC_STATUS_ERR_BADPAYLOAD 2
+#define EVRPC_STATUS_ERR_UNSTARTED 3
+#define EVRPC_STATUS_ERR_HOOKABORTED 4
+ int error;
+
+ /* for looking at headers or other information */
+ struct evhttp_request *http_req;
+};
+
+/* the structure below needs to be synchronized with evrpc_req_generic */
+
+/* Encapsulates a request */
+struct evrpc {
+ TAILQ_ENTRY(evrpc) next;
+
+ /* the URI at which the request handler lives */
+ const char* uri;
+
+ /* creates a new request structure */
+ void *(*request_new)(void *);
+ void *request_new_arg;
+
+ /* frees the request structure */
+ void (*request_free)(void *);
+
+ /* unmarshals the buffer into the proper request structure */
+ int (*request_unmarshal)(void *, struct evbuffer *);
+
+ /* creates a new reply structure */
+ void *(*reply_new)(void *);
+ void *reply_new_arg;
+
+ /* frees the reply structure */
+ void (*reply_free)(void *);
+
+ /* verifies that the reply is valid */
+ int (*reply_complete)(void *);
+
+ /* marshals the reply into a buffer */
+ void (*reply_marshal)(struct evbuffer*, void *);
+
+ /* the callback invoked for each received rpc */
+ void (*cb)(struct evrpc_req_generic *, void *);
+ void *cb_arg;
+
+ /* reference for further configuration */
+ struct evrpc_base *base;
+};
+
+#ifdef EVENT_DEFINED_TQENTRY_
+#undef TAILQ_ENTRY
+#endif
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* EVENT2_RPC_STRUCT_H_INCLUDED_ */
diff --git a/libevent/include/event2/tag.h b/libevent/include/event2/tag.h
new file mode 100644
index 0000000..2f73bfc
--- /dev/null
+++ b/libevent/include/event2/tag.h
@@ -0,0 +1,146 @@
+/*
+ * Copyright (c) 2000-2007 Niels Provos <provos@citi.umich.edu>
+ * Copyright (c) 2007-2012 Niels Provos and Nick Mathewson
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ * derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+#ifndef EVENT2_TAG_H_INCLUDED_
+#define EVENT2_TAG_H_INCLUDED_
+
+/** @file event2/tag.h
+
+ Helper functions for reading and writing tagged data onto buffers.
+
+ */
+
+#include <event2/visibility.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include <event2/event-config.h>
+#ifdef EVENT__HAVE_SYS_TYPES_H
+#include <sys/types.h>
+#endif
+#ifdef EVENT__HAVE_SYS_TIME_H
+#include <sys/time.h>
+#endif
+
+/* For int types. */
+#include <event2/util.h>
+
+struct evbuffer;
+
+/*
+ * Marshaling tagged data - We assume that all tags are inserted in their
+ * numeric order - so that unknown tags will always be higher than the
+ * known ones - and we can just ignore the end of an event buffer.
+ */
+
+EVENT2_EXPORT_SYMBOL
+void evtag_init(void);
+
+/**
+ Unmarshals the header and returns the length of the payload
+
+ @param evbuf the buffer from which to unmarshal data
+ @param ptag a pointer in which the tag id is being stored
+ @returns -1 on failure or the number of bytes in the remaining payload.
+*/
+EVENT2_EXPORT_SYMBOL
+int evtag_unmarshal_header(struct evbuffer *evbuf, ev_uint32_t *ptag);
+
+EVENT2_EXPORT_SYMBOL
+void evtag_marshal(struct evbuffer *evbuf, ev_uint32_t tag, const void *data,
+ ev_uint32_t len);
+EVENT2_EXPORT_SYMBOL
+void evtag_marshal_buffer(struct evbuffer *evbuf, ev_uint32_t tag,
+ struct evbuffer *data);
+
+/**
+ Encode an integer and store it in an evbuffer.
+
+ We encode integers by nybbles; the first nibble contains the number
+ of significant nibbles - 1; this allows us to encode up to 64-bit
+ integers. This function is byte-order independent.
+
+ @param evbuf evbuffer to store the encoded number
+ @param number a 32-bit integer
+ */
+EVENT2_EXPORT_SYMBOL
+void evtag_encode_int(struct evbuffer *evbuf, ev_uint32_t number);
+EVENT2_EXPORT_SYMBOL
+void evtag_encode_int64(struct evbuffer *evbuf, ev_uint64_t number);
+
+EVENT2_EXPORT_SYMBOL
+void evtag_marshal_int(struct evbuffer *evbuf, ev_uint32_t tag,
+ ev_uint32_t integer);
+EVENT2_EXPORT_SYMBOL
+void evtag_marshal_int64(struct evbuffer *evbuf, ev_uint32_t tag,
+ ev_uint64_t integer);
+
+EVENT2_EXPORT_SYMBOL
+void evtag_marshal_string(struct evbuffer *buf, ev_uint32_t tag,
+ const char *string);
+
+EVENT2_EXPORT_SYMBOL
+void evtag_marshal_timeval(struct evbuffer *evbuf, ev_uint32_t tag,
+ struct timeval *tv);
+
+EVENT2_EXPORT_SYMBOL
+int evtag_unmarshal(struct evbuffer *src, ev_uint32_t *ptag,
+ struct evbuffer *dst);
+EVENT2_EXPORT_SYMBOL
+int evtag_peek(struct evbuffer *evbuf, ev_uint32_t *ptag);
+EVENT2_EXPORT_SYMBOL
+int evtag_peek_length(struct evbuffer *evbuf, ev_uint32_t *plength);
+EVENT2_EXPORT_SYMBOL
+int evtag_payload_length(struct evbuffer *evbuf, ev_uint32_t *plength);
+EVENT2_EXPORT_SYMBOL
+int evtag_consume(struct evbuffer *evbuf);
+
+EVENT2_EXPORT_SYMBOL
+int evtag_unmarshal_int(struct evbuffer *evbuf, ev_uint32_t need_tag,
+ ev_uint32_t *pinteger);
+EVENT2_EXPORT_SYMBOL
+int evtag_unmarshal_int64(struct evbuffer *evbuf, ev_uint32_t need_tag,
+ ev_uint64_t *pinteger);
+
+EVENT2_EXPORT_SYMBOL
+int evtag_unmarshal_fixed(struct evbuffer *src, ev_uint32_t need_tag,
+ void *data, size_t len);
+
+EVENT2_EXPORT_SYMBOL
+int evtag_unmarshal_string(struct evbuffer *evbuf, ev_uint32_t need_tag,
+ char **pstring);
+
+EVENT2_EXPORT_SYMBOL
+int evtag_unmarshal_timeval(struct evbuffer *evbuf, ev_uint32_t need_tag,
+ struct timeval *ptv);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* EVENT2_TAG_H_INCLUDED_ */
diff --git a/libevent/include/event2/tag_compat.h b/libevent/include/event2/tag_compat.h
new file mode 100644
index 0000000..a276c0d
--- /dev/null
+++ b/libevent/include/event2/tag_compat.h
@@ -0,0 +1,49 @@
+/*
+ * Copyright (c) 2000-2007 Niels Provos <provos@citi.umich.edu>
+ * Copyright (c) 2007-2012 Niels Provos and Nick Mathewson
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ * derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+#ifndef EVENT2_TAG_COMPAT_H_INCLUDED_
+#define EVENT2_TAG_COMPAT_H_INCLUDED_
+
+/** @file event2/tag_compat.h
+
+ Obsolete/deprecated functions from tag.h; provided only for backwards
+ compatibility.
+ */
+
+/**
+ @name Misnamed functions
+
+ @deprecated These macros are deprecated because their names don't follow
+ Libevent's naming conventions. Use evtag_encode_int and
+ evtag_encode_int64 instead.
+
+ @{
+*/
+#define encode_int(evbuf, number) evtag_encode_int((evbuf), (number))
+#define encode_int64(evbuf, number) evtag_encode_int64((evbuf), (number))
+/**@}*/
+
+#endif /* EVENT2_TAG_H_INCLUDED_ */
diff --git a/libevent/include/event2/thread.h b/libevent/include/event2/thread.h
new file mode 100644
index 0000000..b519986
--- /dev/null
+++ b/libevent/include/event2/thread.h
@@ -0,0 +1,253 @@
+/*
+ * Copyright (c) 2008-2012 Niels Provos and Nick Mathewson
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ * derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+#ifndef EVENT2_THREAD_H_INCLUDED_
+#define EVENT2_THREAD_H_INCLUDED_
+
+/** @file event2/thread.h
+
+ Functions for multi-threaded applications using Libevent.
+
+ When using a multi-threaded application in which multiple threads
+ add and delete events from a single event base, Libevent needs to
+ lock its data structures.
+
+ Like the memory-management function hooks, all of the threading functions
+ _must_ be set up before an event_base is created if you want the base to
+ use them.
+
+ Most programs will either be using Windows threads or Posix threads. You
+ can configure Libevent to use one of these event_use_windows_threads() or
+ event_use_pthreads() respectively. If you're using another threading
+ library, you'll need to configure threading functions manually using
+ evthread_set_lock_callbacks() and evthread_set_condition_callbacks().
+
+ */
+
+#include <event2/visibility.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include <event2/event-config.h>
+
+/**
+ @name Flags passed to lock functions
+
+ @{
+*/
+/** A flag passed to a locking callback when the lock was allocated as a
+ * read-write lock, and we want to acquire or release the lock for writing. */
+#define EVTHREAD_WRITE 0x04
+/** A flag passed to a locking callback when the lock was allocated as a
+ * read-write lock, and we want to acquire or release the lock for reading. */
+#define EVTHREAD_READ 0x08
+/** A flag passed to a locking callback when we don't want to block waiting
+ * for the lock; if we can't get the lock immediately, we will instead
+ * return nonzero from the locking callback. */
+#define EVTHREAD_TRY 0x10
+/**@}*/
+
+#if !defined(EVENT__DISABLE_THREAD_SUPPORT) || defined(EVENT_IN_DOXYGEN_)
+
+#define EVTHREAD_LOCK_API_VERSION 1
+
+/**
+ @name Types of locks
+
+ @{*/
+/** A recursive lock is one that can be acquired multiple times at once by the
+ * same thread. No other process can allocate the lock until the thread that
+ * has been holding it has unlocked it as many times as it locked it. */
+#define EVTHREAD_LOCKTYPE_RECURSIVE 1
+/* A read-write lock is one that allows multiple simultaneous readers, but
+ * where any one writer excludes all other writers and readers. */
+#define EVTHREAD_LOCKTYPE_READWRITE 2
+/**@}*/
+
+/** This structure describes the interface a threading library uses for
+ * locking. It's used to tell evthread_set_lock_callbacks() how to use
+ * locking on this platform.
+ */
+struct evthread_lock_callbacks {
+ /** The current version of the locking API. Set this to
+ * EVTHREAD_LOCK_API_VERSION */
+ int lock_api_version;
+ /** Which kinds of locks does this version of the locking API
+ * support? A bitfield of EVTHREAD_LOCKTYPE_RECURSIVE and
+ * EVTHREAD_LOCKTYPE_READWRITE.
+ *
+ * (Note that RECURSIVE locks are currently mandatory, and
+ * READWRITE locks are not currently used.)
+ **/
+ unsigned supported_locktypes;
+ /** Function to allocate and initialize new lock of type 'locktype'.
+ * Returns NULL on failure. */
+ void *(*alloc)(unsigned locktype);
+ /** Funtion to release all storage held in 'lock', which was created
+ * with type 'locktype'. */
+ void (*free)(void *lock, unsigned locktype);
+ /** Acquire an already-allocated lock at 'lock' with mode 'mode'.
+ * Returns 0 on success, and nonzero on failure. */
+ int (*lock)(unsigned mode, void *lock);
+ /** Release a lock at 'lock' using mode 'mode'. Returns 0 on success,
+ * and nonzero on failure. */
+ int (*unlock)(unsigned mode, void *lock);
+};
+
+/** Sets a group of functions that Libevent should use for locking.
+ * For full information on the required callback API, see the
+ * documentation for the individual members of evthread_lock_callbacks.
+ *
+ * Note that if you're using Windows or the Pthreads threading library, you
+ * probably shouldn't call this function; instead, use
+ * evthread_use_windows_threads() or evthread_use_posix_threads() if you can.
+ */
+EVENT2_EXPORT_SYMBOL
+int evthread_set_lock_callbacks(const struct evthread_lock_callbacks *);
+
+#define EVTHREAD_CONDITION_API_VERSION 1
+
+struct timeval;
+
+/** This structure describes the interface a threading library uses for
+ * condition variables. It's used to tell evthread_set_condition_callbacks
+ * how to use locking on this platform.
+ */
+struct evthread_condition_callbacks {
+ /** The current version of the conditions API. Set this to
+ * EVTHREAD_CONDITION_API_VERSION */
+ int condition_api_version;
+ /** Function to allocate and initialize a new condition variable.
+ * Returns the condition variable on success, and NULL on failure.
+ * The 'condtype' argument will be 0 with this API version.
+ */
+ void *(*alloc_condition)(unsigned condtype);
+ /** Function to free a condition variable. */
+ void (*free_condition)(void *cond);
+ /** Function to signal a condition variable. If 'broadcast' is 1, all
+ * threads waiting on 'cond' should be woken; otherwise, only on one
+ * thread is worken. Should return 0 on success, -1 on failure.
+ * This function will only be called while holding the associated
+ * lock for the condition.
+ */
+ int (*signal_condition)(void *cond, int broadcast);
+ /** Function to wait for a condition variable. The lock 'lock'
+ * will be held when this function is called; should be released
+ * while waiting for the condition to be come signalled, and
+ * should be held again when this function returns.
+ * If timeout is provided, it is interval of seconds to wait for
+ * the event to become signalled; if it is NULL, the function
+ * should wait indefinitely.
+ *
+ * The function should return -1 on error; 0 if the condition
+ * was signalled, or 1 on a timeout. */
+ int (*wait_condition)(void *cond, void *lock,
+ const struct timeval *timeout);
+};
+
+/** Sets a group of functions that Libevent should use for condition variables.
+ * For full information on the required callback API, see the
+ * documentation for the individual members of evthread_condition_callbacks.
+ *
+ * Note that if you're using Windows or the Pthreads threading library, you
+ * probably shouldn't call this function; instead, use
+ * evthread_use_windows_threads() or evthread_use_pthreads() if you can.
+ */
+EVENT2_EXPORT_SYMBOL
+int evthread_set_condition_callbacks(
+ const struct evthread_condition_callbacks *);
+
+/**
+ Sets the function for determining the thread id.
+
+ @param base the event base for which to set the id function
+ @param id_fn the identify function Libevent should invoke to
+ determine the identity of a thread.
+*/
+EVENT2_EXPORT_SYMBOL
+void evthread_set_id_callback(
+ unsigned long (*id_fn)(void));
+
+#if (defined(_WIN32) && !defined(EVENT__DISABLE_THREAD_SUPPORT)) || defined(EVENT_IN_DOXYGEN_)
+/** Sets up Libevent for use with Windows builtin locking and thread ID
+ functions. Unavailable if Libevent is not built for Windows.
+
+ @return 0 on success, -1 on failure. */
+EVENT2_EXPORT_SYMBOL
+int evthread_use_windows_threads(void);
+/**
+ Defined if Libevent was built with support for evthread_use_windows_threads()
+*/
+#define EVTHREAD_USE_WINDOWS_THREADS_IMPLEMENTED 1
+#endif
+
+#if defined(EVENT__HAVE_PTHREADS) || defined(EVENT_IN_DOXYGEN_)
+/** Sets up Libevent for use with Pthreads locking and thread ID functions.
+ Unavailable if Libevent is not build for use with pthreads. Requires
+ libraries to link against Libevent_pthreads as well as Libevent.
+
+ @return 0 on success, -1 on failure. */
+EVENT2_EXPORT_SYMBOL
+int evthread_use_pthreads(void);
+/** Defined if Libevent was built with support for evthread_use_pthreads() */
+#define EVTHREAD_USE_PTHREADS_IMPLEMENTED 1
+
+#endif
+
+/** Enable debugging wrappers around the current lock callbacks. If Libevent
+ * makes one of several common locking errors, exit with an assertion failure.
+ *
+ * If you're going to call this function, you must do so before any locks are
+ * allocated.
+ **/
+EVENT2_EXPORT_SYMBOL
+void evthread_enable_lock_debugging(void);
+
+/* Old (misspelled) version: This is deprecated; use
+ * evthread_enable_log_debugging instead. */
+EVENT2_EXPORT_SYMBOL
+void evthread_enable_lock_debuging(void);
+
+#endif /* EVENT__DISABLE_THREAD_SUPPORT */
+
+struct event_base;
+/** Make sure it's safe to tell an event base to wake up from another thread
+ or a signal handler.
+
+ You shouldn't need to call this by hand; configuring the base with thread
+ support should be necessary and sufficient.
+
+ @return 0 on success, -1 on failure.
+ */
+EVENT2_EXPORT_SYMBOL
+int evthread_make_base_notifiable(struct event_base *base);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* EVENT2_THREAD_H_INCLUDED_ */
diff --git a/libevent/include/event2/util.h b/libevent/include/event2/util.h
new file mode 100644
index 0000000..02aa7ba
--- /dev/null
+++ b/libevent/include/event2/util.h
@@ -0,0 +1,888 @@
+/*
+ * Copyright (c) 2007-2012 Niels Provos and Nick Mathewson
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ * derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+#ifndef EVENT2_UTIL_H_INCLUDED_
+#define EVENT2_UTIL_H_INCLUDED_
+
+/** @file event2/util.h
+
+ Common convenience functions for cross-platform portability and
+ related socket manipulations.
+
+ */
+#include <event2/visibility.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include <event2/event-config.h>
+#ifdef EVENT__HAVE_SYS_TIME_H
+#include <sys/time.h>
+#endif
+#ifdef EVENT__HAVE_STDINT_H
+#include <stdint.h>
+#elif defined(EVENT__HAVE_INTTYPES_H)
+#include <inttypes.h>
+#endif
+#ifdef EVENT__HAVE_SYS_TYPES_H
+#include <sys/types.h>
+#endif
+#ifdef EVENT__HAVE_STDDEF_H
+#include <stddef.h>
+#endif
+#ifdef _MSC_VER
+#include <BaseTsd.h>
+#endif
+#include <stdarg.h>
+#ifdef EVENT__HAVE_NETDB_H
+#include <netdb.h>
+#endif
+
+#ifdef _WIN32
+#include <winsock2.h>
+#ifdef EVENT__HAVE_GETADDRINFO
+/* for EAI_* definitions. */
+#include <ws2tcpip.h>
+#endif
+#else
+#ifdef EVENT__HAVE_ERRNO_H
+#include <errno.h>
+#endif
+#include <sys/socket.h>
+#endif
+
+#include <time.h>
+
+/* Some openbsd autoconf versions get the name of this macro wrong. */
+#if defined(EVENT__SIZEOF_VOID__) && !defined(EVENT__SIZEOF_VOID_P)
+#define EVENT__SIZEOF_VOID_P EVENT__SIZEOF_VOID__
+#endif
+
+/**
+ * @name Standard integer types.
+ *
+ * Integer type definitions for types that are supposed to be defined in the
+ * C99-specified stdint.h. Shamefully, some platforms do not include
+ * stdint.h, so we need to replace it. (If you are on a platform like this,
+ * your C headers are now over 10 years out of date. You should bug them to
+ * do something about this.)
+ *
+ * We define:
+ *
+ * <dl>
+ * <dt>ev_uint64_t, ev_uint32_t, ev_uint16_t, ev_uint8_t</dt>
+ * <dd>unsigned integer types of exactly 64, 32, 16, and 8 bits
+ * respectively.</dd>
+ * <dt>ev_int64_t, ev_int32_t, ev_int16_t, ev_int8_t</dt>
+ * <dd>signed integer types of exactly 64, 32, 16, and 8 bits
+ * respectively.</dd>
+ * <dt>ev_uintptr_t, ev_intptr_t</dt>
+ * <dd>unsigned/signed integers large enough
+ * to hold a pointer without loss of bits.</dd>
+ * <dt>ev_ssize_t</dt>
+ * <dd>A signed type of the same size as size_t</dd>
+ * <dt>ev_off_t</dt>
+ * <dd>A signed type typically used to represent offsets within a
+ * (potentially large) file</dd>
+ *
+ * @{
+ */
+#ifdef EVENT__HAVE_UINT64_T
+#define ev_uint64_t uint64_t
+#define ev_int64_t int64_t
+#elif defined(_WIN32)
+#define ev_uint64_t unsigned __int64
+#define ev_int64_t signed __int64
+#elif EVENT__SIZEOF_LONG_LONG == 8
+#define ev_uint64_t unsigned long long
+#define ev_int64_t long long
+#elif EVENT__SIZEOF_LONG == 8
+#define ev_uint64_t unsigned long
+#define ev_int64_t long
+#elif defined(EVENT_IN_DOXYGEN_)
+#define ev_uint64_t ...
+#define ev_int64_t ...
+#else
+#error "No way to define ev_uint64_t"
+#endif
+
+#ifdef EVENT__HAVE_UINT32_T
+#define ev_uint32_t uint32_t
+#define ev_int32_t int32_t
+#elif defined(_WIN32)
+#define ev_uint32_t unsigned int
+#define ev_int32_t signed int
+#elif EVENT__SIZEOF_LONG == 4
+#define ev_uint32_t unsigned long
+#define ev_int32_t signed long
+#elif EVENT__SIZEOF_INT == 4
+#define ev_uint32_t unsigned int
+#define ev_int32_t signed int
+#elif defined(EVENT_IN_DOXYGEN_)
+#define ev_uint32_t ...
+#define ev_int32_t ...
+#else
+#error "No way to define ev_uint32_t"
+#endif
+
+#ifdef EVENT__HAVE_UINT16_T
+#define ev_uint16_t uint16_t
+#define ev_int16_t int16_t
+#elif defined(_WIN32)
+#define ev_uint16_t unsigned short
+#define ev_int16_t signed short
+#elif EVENT__SIZEOF_INT == 2
+#define ev_uint16_t unsigned int
+#define ev_int16_t signed int
+#elif EVENT__SIZEOF_SHORT == 2
+#define ev_uint16_t unsigned short
+#define ev_int16_t signed short
+#elif defined(EVENT_IN_DOXYGEN_)
+#define ev_uint16_t ...
+#define ev_int16_t ...
+#else
+#error "No way to define ev_uint16_t"
+#endif
+
+#ifdef EVENT__HAVE_UINT8_T
+#define ev_uint8_t uint8_t
+#define ev_int8_t int8_t
+#elif defined(EVENT_IN_DOXYGEN_)
+#define ev_uint8_t ...
+#define ev_int8_t ...
+#else
+#define ev_uint8_t unsigned char
+#define ev_int8_t signed char
+#endif
+
+#ifdef EVENT__HAVE_UINTPTR_T
+#define ev_uintptr_t uintptr_t
+#define ev_intptr_t intptr_t
+#elif EVENT__SIZEOF_VOID_P <= 4
+#define ev_uintptr_t ev_uint32_t
+#define ev_intptr_t ev_int32_t
+#elif EVENT__SIZEOF_VOID_P <= 8
+#define ev_uintptr_t ev_uint64_t
+#define ev_intptr_t ev_int64_t
+#elif defined(EVENT_IN_DOXYGEN_)
+#define ev_uintptr_t ...
+#define ev_intptr_t ...
+#else
+#error "No way to define ev_uintptr_t"
+#endif
+
+#ifdef EVENT__ssize_t
+#define ev_ssize_t EVENT__ssize_t
+#else
+#define ev_ssize_t ssize_t
+#endif
+
+/* Note that we define ev_off_t based on the compile-time size of off_t that
+ * we used to build Libevent, and not based on the current size of off_t.
+ * (For example, we don't define ev_off_t to off_t.). We do this because
+ * some systems let you build your software with different off_t sizes
+ * at runtime, and so putting in any dependency on off_t would risk API
+ * mismatch.
+ */
+#ifdef _WIN32
+#define ev_off_t ev_int64_t
+#elif EVENT__SIZEOF_OFF_T == 8
+#define ev_off_t ev_int64_t
+#elif EVENT__SIZEOF_OFF_T == 4
+#define ev_off_t ev_int32_t
+#elif defined(EVENT_IN_DOXYGEN_)
+#define ev_off_t ...
+#else
+#define ev_off_t off_t
+#endif
+/**@}*/
+
+/* Limits for integer types.
+
+ We're making two assumptions here:
+ - The compiler does constant folding properly.
+ - The platform does signed arithmetic in two's complement.
+*/
+
+/**
+ @name Limits for integer types
+
+ These macros hold the largest or smallest values possible for the
+ ev_[u]int*_t types.
+
+ @{
+*/
+#ifndef EVENT__HAVE_STDINT_H
+#define EV_UINT64_MAX ((((ev_uint64_t)0xffffffffUL) << 32) | 0xffffffffUL)
+#define EV_INT64_MAX ((((ev_int64_t) 0x7fffffffL) << 32) | 0xffffffffL)
+#define EV_INT64_MIN ((-EV_INT64_MAX) - 1)
+#define EV_UINT32_MAX ((ev_uint32_t)0xffffffffUL)
+#define EV_INT32_MAX ((ev_int32_t) 0x7fffffffL)
+#define EV_INT32_MIN ((-EV_INT32_MAX) - 1)
+#define EV_UINT16_MAX ((ev_uint16_t)0xffffUL)
+#define EV_INT16_MAX ((ev_int16_t) 0x7fffL)
+#define EV_INT16_MIN ((-EV_INT16_MAX) - 1)
+#define EV_UINT8_MAX 255
+#define EV_INT8_MAX 127
+#define EV_INT8_MIN ((-EV_INT8_MAX) - 1)
+#else
+#define EV_UINT64_MAX UINT64_MAX
+#define EV_INT64_MAX INT64_MAX
+#define EV_INT64_MIN INT64_MIN
+#define EV_UINT32_MAX UINT32_MAX
+#define EV_INT32_MAX INT32_MAX
+#define EV_INT32_MIN INT32_MIN
+#define EV_UINT16_MAX UINT16_MAX
+#define EV_INT16_MIN INT16_MIN
+#define EV_INT16_MAX INT16_MAX
+#define EV_UINT8_MAX UINT8_MAX
+#define EV_INT8_MAX INT8_MAX
+#define EV_INT8_MIN INT8_MIN
+/** @} */
+#endif
+
+
+/**
+ @name Limits for SIZE_T and SSIZE_T
+
+ @{
+*/
+#if EVENT__SIZEOF_SIZE_T == 8
+#define EV_SIZE_MAX EV_UINT64_MAX
+#define EV_SSIZE_MAX EV_INT64_MAX
+#elif EVENT__SIZEOF_SIZE_T == 4
+#define EV_SIZE_MAX EV_UINT32_MAX
+#define EV_SSIZE_MAX EV_INT32_MAX
+#elif defined(EVENT_IN_DOXYGEN_)
+#define EV_SIZE_MAX ...
+#define EV_SSIZE_MAX ...
+#else
+#error "No way to define SIZE_MAX"
+#endif
+
+#define EV_SSIZE_MIN ((-EV_SSIZE_MAX) - 1)
+/**@}*/
+
+#ifdef _WIN32
+#define ev_socklen_t int
+#elif defined(EVENT__socklen_t)
+#define ev_socklen_t EVENT__socklen_t
+#else
+#define ev_socklen_t socklen_t
+#endif
+
+#ifdef EVENT__HAVE_STRUCT_SOCKADDR_STORAGE___SS_FAMILY
+#if !defined(EVENT__HAVE_STRUCT_SOCKADDR_STORAGE_SS_FAMILY) \
+ && !defined(ss_family)
+#define ss_family __ss_family
+#endif
+#endif
+
+/**
+ * A type wide enough to hold the output of "socket()" or "accept()". On
+ * Windows, this is an intptr_t; elsewhere, it is an int. */
+#ifdef _WIN32
+#define evutil_socket_t intptr_t
+#else
+#define evutil_socket_t int
+#endif
+
+/**
+ * Structure to hold information about a monotonic timer
+ *
+ * Use this with evutil_configure_monotonic_time() and
+ * evutil_gettime_monotonic().
+ *
+ * This is an opaque structure; you can allocate one using
+ * evutil_monotonic_timer_new().
+ *
+ * @see evutil_monotonic_timer_new(), evutil_monotonic_timer_free(),
+ * evutil_configure_monotonic_time(), evutil_gettime_monotonic()
+ */
+struct evutil_monotonic_timer
+#ifdef EVENT_IN_DOXYGEN_
+{/*Empty body so that doxygen will generate documentation here.*/}
+#endif
+;
+
+#define EV_MONOT_PRECISE 1
+#define EV_MONOT_FALLBACK 2
+
+/** Format a date string using RFC 1123 format (used in HTTP).
+ * If `tm` is NULL, current system's time will be used.
+ * The number of characters written will be returned.
+ * One should check if the return value is smaller than `datelen` to check if
+ * the result is truncated or not.
+ */
+EVENT2_EXPORT_SYMBOL int
+evutil_date_rfc1123(char *date, const size_t datelen, const struct tm *tm);
+
+/** Allocate a new struct evutil_monotonic_timer for use with the
+ * evutil_configure_monotonic_time() and evutil_gettime_monotonic()
+ * functions. You must configure the timer with
+ * evutil_configure_monotonic_time() before using it.
+ */
+EVENT2_EXPORT_SYMBOL
+struct evutil_monotonic_timer * evutil_monotonic_timer_new(void);
+
+/** Free a struct evutil_monotonic_timer that was allocated using
+ * evutil_monotonic_timer_new().
+ */
+EVENT2_EXPORT_SYMBOL
+void evutil_monotonic_timer_free(struct evutil_monotonic_timer *timer);
+
+/** Set up a struct evutil_monotonic_timer; flags can include
+ * EV_MONOT_PRECISE and EV_MONOT_FALLBACK.
+ */
+EVENT2_EXPORT_SYMBOL
+int evutil_configure_monotonic_time(struct evutil_monotonic_timer *timer,
+ int flags);
+
+/** Query the current monotonic time from a struct evutil_monotonic_timer
+ * previously configured with evutil_configure_monotonic_time(). Monotonic
+ * time is guaranteed never to run in reverse, but is not necessarily epoch-
+ * based, or relative to any other definite point. Use it to make reliable
+ * measurements of elapsed time between events even when the system time
+ * may be changed.
+ *
+ * It is not safe to use this funtion on the same timer from multiple
+ * threads.
+ */
+EVENT2_EXPORT_SYMBOL
+int evutil_gettime_monotonic(struct evutil_monotonic_timer *timer,
+ struct timeval *tp);
+
+/** Create two new sockets that are connected to each other.
+
+ On Unix, this simply calls socketpair(). On Windows, it uses the
+ loopback network interface on 127.0.0.1, and only
+ AF_INET,SOCK_STREAM are supported.
+
+ (This may fail on some Windows hosts where firewall software has cleverly
+ decided to keep 127.0.0.1 from talking to itself.)
+
+ Parameters and return values are as for socketpair()
+*/
+EVENT2_EXPORT_SYMBOL
+int evutil_socketpair(int d, int type, int protocol, evutil_socket_t sv[2]);
+/** Do platform-specific operations as needed to make a socket nonblocking.
+
+ @param sock The socket to make nonblocking
+ @return 0 on success, -1 on failure
+ */
+EVENT2_EXPORT_SYMBOL
+int evutil_make_socket_nonblocking(evutil_socket_t sock);
+
+/** Do platform-specific operations to make a listener socket reusable.
+
+ Specifically, we want to make sure that another program will be able
+ to bind this address right after we've closed the listener.
+
+ This differs from Windows's interpretation of "reusable", which
+ allows multiple listeners to bind the same address at the same time.
+
+ @param sock The socket to make reusable
+ @return 0 on success, -1 on failure
+ */
+EVENT2_EXPORT_SYMBOL
+int evutil_make_listen_socket_reuseable(evutil_socket_t sock);
+
+/** Do platform-specific operations to make a listener port reusable.
+
+ Specifically, we want to make sure that multiple programs which also
+ set the same socket option will be able to bind, listen at the same time.
+
+ This is a feature available only to Linux 3.9+
+
+ @param sock The socket to make reusable
+ @return 0 on success, -1 on failure
+ */
+EVENT2_EXPORT_SYMBOL
+int evutil_make_listen_socket_reuseable_port(evutil_socket_t sock);
+
+/** Set ipv6 only bind socket option to make listener work only in ipv6 sockets.
+
+ According to RFC3493 and most Linux distributions, default value for the
+ sockets is to work in IPv4-mapped mode. In IPv4-mapped mode, it is not possible
+ to bind same port from different IPv4 and IPv6 handlers.
+
+ @param sock The socket to make in ipv6only working mode
+ @return 0 on success, -1 on failure
+ */
+EVENT2_EXPORT_SYMBOL
+int evutil_make_listen_socket_ipv6only(evutil_socket_t sock);
+
+/** Do platform-specific operations as needed to close a socket upon a
+ successful execution of one of the exec*() functions.
+
+ @param sock The socket to be closed
+ @return 0 on success, -1 on failure
+ */
+EVENT2_EXPORT_SYMBOL
+int evutil_make_socket_closeonexec(evutil_socket_t sock);
+
+/** Do the platform-specific call needed to close a socket returned from
+ socket() or accept().
+
+ @param sock The socket to be closed
+ @return 0 on success (whether the operation is supported or not),
+ -1 on failure
+ */
+EVENT2_EXPORT_SYMBOL
+int evutil_closesocket(evutil_socket_t sock);
+#define EVUTIL_CLOSESOCKET(s) evutil_closesocket(s)
+
+/** Do platform-specific operations, if possible, to make a tcp listener
+ * socket defer accept()s until there is data to read.
+ *
+ * Not all platforms support this. You don't want to do this for every
+ * listener socket: only the ones that implement a protocol where the
+ * client transmits before the server needs to respond.
+ *
+ * @param sock The listening socket to to make deferred
+ * @return 0 on success (whether the operation is supported or not),
+ * -1 on failure
+*/
+EVENT2_EXPORT_SYMBOL
+int evutil_make_tcp_listen_socket_deferred(evutil_socket_t sock);
+
+#ifdef _WIN32
+/** Return the most recent socket error. Not idempotent on all platforms. */
+#define EVUTIL_SOCKET_ERROR() WSAGetLastError()
+/** Replace the most recent socket error with errcode */
+#define EVUTIL_SET_SOCKET_ERROR(errcode) \
+ do { WSASetLastError(errcode); } while (0)
+/** Return the most recent socket error to occur on sock. */
+EVENT2_EXPORT_SYMBOL
+int evutil_socket_geterror(evutil_socket_t sock);
+/** Convert a socket error to a string. */
+EVENT2_EXPORT_SYMBOL
+const char *evutil_socket_error_to_string(int errcode);
+#define EVUTIL_INVALID_SOCKET INVALID_SOCKET
+#elif defined(EVENT_IN_DOXYGEN_)
+/**
+ @name Socket error functions
+
+ These functions are needed for making programs compatible between
+ Windows and Unix-like platforms.
+
+ You see, Winsock handles socket errors differently from the rest of
+ the world. Elsewhere, a socket error is like any other error and is
+ stored in errno. But winsock functions require you to retrieve the
+ error with a special function, and don't let you use strerror for
+ the error codes. And handling EWOULDBLOCK is ... different.
+
+ @{
+*/
+/** Return the most recent socket error. Not idempotent on all platforms. */
+#define EVUTIL_SOCKET_ERROR() ...
+/** Replace the most recent socket error with errcode */
+#define EVUTIL_SET_SOCKET_ERROR(errcode) ...
+/** Return the most recent socket error to occur on sock. */
+#define evutil_socket_geterror(sock) ...
+/** Convert a socket error to a string. */
+#define evutil_socket_error_to_string(errcode) ...
+#define EVUTIL_INVALID_SOCKET -1
+/**@}*/
+#else /** !EVENT_IN_DOXYGEN_ && !_WIN32 */
+#define EVUTIL_SOCKET_ERROR() (errno)
+#define EVUTIL_SET_SOCKET_ERROR(errcode) \
+ do { errno = (errcode); } while (0)
+#define evutil_socket_geterror(sock) (errno)
+#define evutil_socket_error_to_string(errcode) (strerror(errcode))
+#define EVUTIL_INVALID_SOCKET -1
+#endif /** !_WIN32 */
+
+
+/**
+ * @name Manipulation macros for struct timeval.
+ *
+ * We define replacements
+ * for timeradd, timersub, timerclear, timercmp, and timerisset.
+ *
+ * @{
+ */
+#ifdef EVENT__HAVE_TIMERADD
+#define evutil_timeradd(tvp, uvp, vvp) timeradd((tvp), (uvp), (vvp))
+#define evutil_timersub(tvp, uvp, vvp) timersub((tvp), (uvp), (vvp))
+#else
+#define evutil_timeradd(tvp, uvp, vvp) \
+ do { \
+ (vvp)->tv_sec = (tvp)->tv_sec + (uvp)->tv_sec; \
+ (vvp)->tv_usec = (tvp)->tv_usec + (uvp)->tv_usec; \
+ if ((vvp)->tv_usec >= 1000000) { \
+ (vvp)->tv_sec++; \
+ (vvp)->tv_usec -= 1000000; \
+ } \
+ } while (0)
+#define evutil_timersub(tvp, uvp, vvp) \
+ do { \
+ (vvp)->tv_sec = (tvp)->tv_sec - (uvp)->tv_sec; \
+ (vvp)->tv_usec = (tvp)->tv_usec - (uvp)->tv_usec; \
+ if ((vvp)->tv_usec < 0) { \
+ (vvp)->tv_sec--; \
+ (vvp)->tv_usec += 1000000; \
+ } \
+ } while (0)
+#endif /* !EVENT__HAVE_TIMERADD */
+
+#ifdef EVENT__HAVE_TIMERCLEAR
+#define evutil_timerclear(tvp) timerclear(tvp)
+#else
+#define evutil_timerclear(tvp) (tvp)->tv_sec = (tvp)->tv_usec = 0
+#endif
+/**@}*/
+
+/** Return true iff the tvp is related to uvp according to the relational
+ * operator cmp. Recognized values for cmp are ==, <=, <, >=, and >. */
+#define evutil_timercmp(tvp, uvp, cmp) \
+ (((tvp)->tv_sec == (uvp)->tv_sec) ? \
+ ((tvp)->tv_usec cmp (uvp)->tv_usec) : \
+ ((tvp)->tv_sec cmp (uvp)->tv_sec))
+
+#ifdef EVENT__HAVE_TIMERISSET
+#define evutil_timerisset(tvp) timerisset(tvp)
+#else
+#define evutil_timerisset(tvp) ((tvp)->tv_sec || (tvp)->tv_usec)
+#endif
+
+/** Replacement for offsetof on platforms that don't define it. */
+#ifdef offsetof
+#define evutil_offsetof(type, field) offsetof(type, field)
+#else
+#define evutil_offsetof(type, field) ((off_t)(&((type *)0)->field))
+#endif
+
+/* big-int related functions */
+/** Parse a 64-bit value from a string. Arguments are as for strtol. */
+EVENT2_EXPORT_SYMBOL
+ev_int64_t evutil_strtoll(const char *s, char **endptr, int base);
+
+/** Replacement for gettimeofday on platforms that lack it. */
+#ifdef EVENT__HAVE_GETTIMEOFDAY
+#define evutil_gettimeofday(tv, tz) gettimeofday((tv), (tz))
+#else
+struct timezone;
+EVENT2_EXPORT_SYMBOL
+int evutil_gettimeofday(struct timeval *tv, struct timezone *tz);
+#endif
+
+/** Replacement for snprintf to get consistent behavior on platforms for
+ which the return value of snprintf does not conform to C99.
+ */
+EVENT2_EXPORT_SYMBOL
+int evutil_snprintf(char *buf, size_t buflen, const char *format, ...)
+#ifdef __GNUC__
+ __attribute__((format(printf, 3, 4)))
+#endif
+;
+/** Replacement for vsnprintf to get consistent behavior on platforms for
+ which the return value of snprintf does not conform to C99.
+ */
+EVENT2_EXPORT_SYMBOL
+int evutil_vsnprintf(char *buf, size_t buflen, const char *format, va_list ap)
+#ifdef __GNUC__
+ __attribute__((format(printf, 3, 0)))
+#endif
+;
+
+/** Replacement for inet_ntop for platforms which lack it. */
+EVENT2_EXPORT_SYMBOL
+const char *evutil_inet_ntop(int af, const void *src, char *dst, size_t len);
+/** Variation of inet_pton that also parses IPv6 scopes. Public for
+ unit tests. No reason to call this directly.
+ */
+EVENT2_EXPORT_SYMBOL
+int evutil_inet_pton_scope(int af, const char *src, void *dst,
+ unsigned *indexp);
+/** Replacement for inet_pton for platforms which lack it. */
+EVENT2_EXPORT_SYMBOL
+int evutil_inet_pton(int af, const char *src, void *dst);
+struct sockaddr;
+
+/** Parse an IPv4 or IPv6 address, with optional port, from a string.
+
+ Recognized formats are:
+ - [IPv6Address]:port
+ - [IPv6Address]
+ - IPv6Address
+ - IPv4Address:port
+ - IPv4Address
+
+ If no port is specified, the port in the output is set to 0.
+
+ @param str The string to parse.
+ @param out A struct sockaddr to hold the result. This should probably be
+ a struct sockaddr_storage.
+ @param outlen A pointer to the number of bytes that that 'out' can safely
+ hold. Set to the number of bytes used in 'out' on success.
+ @return -1 if the address is not well-formed, if the port is out of range,
+ or if out is not large enough to hold the result. Otherwise returns
+ 0 on success.
+*/
+EVENT2_EXPORT_SYMBOL
+int evutil_parse_sockaddr_port(const char *str, struct sockaddr *out, int *outlen);
+
+/** Compare two sockaddrs; return 0 if they are equal, or less than 0 if sa1
+ * preceeds sa2, or greater than 0 if sa1 follows sa2. If include_port is
+ * true, consider the port as well as the address. Only implemented for
+ * AF_INET and AF_INET6 addresses. The ordering is not guaranteed to remain
+ * the same between Libevent versions. */
+EVENT2_EXPORT_SYMBOL
+int evutil_sockaddr_cmp(const struct sockaddr *sa1, const struct sockaddr *sa2,
+ int include_port);
+
+/** As strcasecmp, but always compares the characters in locale-independent
+ ASCII. That's useful if you're handling data in ASCII-based protocols.
+ */
+EVENT2_EXPORT_SYMBOL
+int evutil_ascii_strcasecmp(const char *str1, const char *str2);
+/** As strncasecmp, but always compares the characters in locale-independent
+ ASCII. That's useful if you're handling data in ASCII-based protocols.
+ */
+EVENT2_EXPORT_SYMBOL
+int evutil_ascii_strncasecmp(const char *str1, const char *str2, size_t n);
+
+/* Here we define evutil_addrinfo to the native addrinfo type, or redefine it
+ * if this system has no getaddrinfo(). */
+#ifdef EVENT__HAVE_STRUCT_ADDRINFO
+#define evutil_addrinfo addrinfo
+#else
+/** A definition of struct addrinfo for systems that lack it.
+
+ (This is just an alias for struct addrinfo if the system defines
+ struct addrinfo.)
+*/
+struct evutil_addrinfo {
+ int ai_flags; /* AI_PASSIVE, AI_CANONNAME, AI_NUMERICHOST */
+ int ai_family; /* PF_xxx */
+ int ai_socktype; /* SOCK_xxx */
+ int ai_protocol; /* 0 or IPPROTO_xxx for IPv4 and IPv6 */
+ size_t ai_addrlen; /* length of ai_addr */
+ char *ai_canonname; /* canonical name for nodename */
+ struct sockaddr *ai_addr; /* binary address */
+ struct evutil_addrinfo *ai_next; /* next structure in linked list */
+};
+#endif
+/** @name evutil_getaddrinfo() error codes
+
+ These values are possible error codes for evutil_getaddrinfo() and
+ related functions.
+
+ @{
+*/
+#if defined(EAI_ADDRFAMILY) && defined(EVENT__HAVE_GETADDRINFO)
+#define EVUTIL_EAI_ADDRFAMILY EAI_ADDRFAMILY
+#else
+#define EVUTIL_EAI_ADDRFAMILY -901
+#endif
+#if defined(EAI_AGAIN) && defined(EVENT__HAVE_GETADDRINFO)
+#define EVUTIL_EAI_AGAIN EAI_AGAIN
+#else
+#define EVUTIL_EAI_AGAIN -902
+#endif
+#if defined(EAI_BADFLAGS) && defined(EVENT__HAVE_GETADDRINFO)
+#define EVUTIL_EAI_BADFLAGS EAI_BADFLAGS
+#else
+#define EVUTIL_EAI_BADFLAGS -903
+#endif
+#if defined(EAI_FAIL) && defined(EVENT__HAVE_GETADDRINFO)
+#define EVUTIL_EAI_FAIL EAI_FAIL
+#else
+#define EVUTIL_EAI_FAIL -904
+#endif
+#if defined(EAI_FAMILY) && defined(EVENT__HAVE_GETADDRINFO)
+#define EVUTIL_EAI_FAMILY EAI_FAMILY
+#else
+#define EVUTIL_EAI_FAMILY -905
+#endif
+#if defined(EAI_MEMORY) && defined(EVENT__HAVE_GETADDRINFO)
+#define EVUTIL_EAI_MEMORY EAI_MEMORY
+#else
+#define EVUTIL_EAI_MEMORY -906
+#endif
+/* This test is a bit complicated, since some MS SDKs decide to
+ * remove NODATA or redefine it to be the same as NONAME, in a
+ * fun interpretation of RFC 2553 and RFC 3493. */
+#if defined(EAI_NODATA) && defined(EVENT__HAVE_GETADDRINFO) && (!defined(EAI_NONAME) || EAI_NODATA != EAI_NONAME)
+#define EVUTIL_EAI_NODATA EAI_NODATA
+#else
+#define EVUTIL_EAI_NODATA -907
+#endif
+#if defined(EAI_NONAME) && defined(EVENT__HAVE_GETADDRINFO)
+#define EVUTIL_EAI_NONAME EAI_NONAME
+#else
+#define EVUTIL_EAI_NONAME -908
+#endif
+#if defined(EAI_SERVICE) && defined(EVENT__HAVE_GETADDRINFO)
+#define EVUTIL_EAI_SERVICE EAI_SERVICE
+#else
+#define EVUTIL_EAI_SERVICE -909
+#endif
+#if defined(EAI_SOCKTYPE) && defined(EVENT__HAVE_GETADDRINFO)
+#define EVUTIL_EAI_SOCKTYPE EAI_SOCKTYPE
+#else
+#define EVUTIL_EAI_SOCKTYPE -910
+#endif
+#if defined(EAI_SYSTEM) && defined(EVENT__HAVE_GETADDRINFO)
+#define EVUTIL_EAI_SYSTEM EAI_SYSTEM
+#else
+#define EVUTIL_EAI_SYSTEM -911
+#endif
+
+#define EVUTIL_EAI_CANCEL -90001
+
+#if defined(AI_PASSIVE) && defined(EVENT__HAVE_GETADDRINFO)
+#define EVUTIL_AI_PASSIVE AI_PASSIVE
+#else
+#define EVUTIL_AI_PASSIVE 0x1000
+#endif
+#if defined(AI_CANONNAME) && defined(EVENT__HAVE_GETADDRINFO)
+#define EVUTIL_AI_CANONNAME AI_CANONNAME
+#else
+#define EVUTIL_AI_CANONNAME 0x2000
+#endif
+#if defined(AI_NUMERICHOST) && defined(EVENT__HAVE_GETADDRINFO)
+#define EVUTIL_AI_NUMERICHOST AI_NUMERICHOST
+#else
+#define EVUTIL_AI_NUMERICHOST 0x4000
+#endif
+#if defined(AI_NUMERICSERV) && defined(EVENT__HAVE_GETADDRINFO)
+#define EVUTIL_AI_NUMERICSERV AI_NUMERICSERV
+#else
+#define EVUTIL_AI_NUMERICSERV 0x8000
+#endif
+#if defined(AI_V4MAPPED) && defined(EVENT__HAVE_GETADDRINFO)
+#define EVUTIL_AI_V4MAPPED AI_V4MAPPED
+#else
+#define EVUTIL_AI_V4MAPPED 0x10000
+#endif
+#if defined(AI_ALL) && defined(EVENT__HAVE_GETADDRINFO)
+#define EVUTIL_AI_ALL AI_ALL
+#else
+#define EVUTIL_AI_ALL 0x20000
+#endif
+#if defined(AI_ADDRCONFIG) && defined(EVENT__HAVE_GETADDRINFO)
+#define EVUTIL_AI_ADDRCONFIG AI_ADDRCONFIG
+#else
+#define EVUTIL_AI_ADDRCONFIG 0x40000
+#endif
+/**@}*/
+
+struct evutil_addrinfo;
+/**
+ * This function clones getaddrinfo for systems that don't have it. For full
+ * details, see RFC 3493, section 6.1.
+ *
+ * Limitations:
+ * - When the system has no getaddrinfo, we fall back to gethostbyname_r or
+ * gethostbyname, with their attendant issues.
+ * - The AI_V4MAPPED and AI_ALL flags are not currently implemented.
+ *
+ * For a nonblocking variant, see evdns_getaddrinfo.
+ */
+EVENT2_EXPORT_SYMBOL
+int evutil_getaddrinfo(const char *nodename, const char *servname,
+ const struct evutil_addrinfo *hints_in, struct evutil_addrinfo **res);
+
+/** Release storage allocated by evutil_getaddrinfo or evdns_getaddrinfo. */
+EVENT2_EXPORT_SYMBOL
+void evutil_freeaddrinfo(struct evutil_addrinfo *ai);
+
+EVENT2_EXPORT_SYMBOL
+const char *evutil_gai_strerror(int err);
+
+/** Generate n bytes of secure pseudorandom data, and store them in buf.
+ *
+ * Current versions of Libevent use an ARC4-based random number generator,
+ * seeded using the platform's entropy source (/dev/urandom on Unix-like
+ * systems; CryptGenRandom on Windows). This is not actually as secure as it
+ * should be: ARC4 is a pretty lousy cipher, and the current implementation
+ * provides only rudimentary prediction- and backtracking-resistance. Don't
+ * use this for serious cryptographic applications.
+ */
+EVENT2_EXPORT_SYMBOL
+void evutil_secure_rng_get_bytes(void *buf, size_t n);
+
+/**
+ * Seed the secure random number generator if needed, and return 0 on
+ * success or -1 on failure.
+ *
+ * It is okay to call this function more than once; it will still return
+ * 0 if the RNG has been successfully seeded and -1 if it can't be
+ * seeded.
+ *
+ * Ordinarily you don't need to call this function from your own code;
+ * Libevent will seed the RNG itself the first time it needs good random
+ * numbers. You only need to call it if (a) you want to double-check
+ * that one of the seeding methods did succeed, or (b) you plan to drop
+ * the capability to seed (by chrooting, or dropping capabilities, or
+ * whatever), and you want to make sure that seeding happens before your
+ * program loses the ability to do it.
+ */
+EVENT2_EXPORT_SYMBOL
+int evutil_secure_rng_init(void);
+
+/**
+ * Set a filename to use in place of /dev/urandom for seeding the secure
+ * PRNG. Return 0 on success, -1 on failure.
+ *
+ * Call this function BEFORE calling any other initialization or RNG
+ * functions.
+ *
+ * (This string will _NOT_ be copied internally. Do not free it while any
+ * user of the secure RNG might be running. Don't pass anything other than a
+ * real /dev/...random device file here, or you might lose security.)
+ *
+ * This API is unstable, and might change in a future libevent version.
+ */
+EVENT2_EXPORT_SYMBOL
+int evutil_secure_rng_set_urandom_device_file(char *fname);
+
+#if !defined(EVENT__HAVE_ARC4RANDOM) || defined(EVENT__HAVE_ARC4RANDOM_ADDRANDOM)
+/** Seed the random number generator with extra random bytes.
+
+ You should almost never need to call this function; it should be
+ sufficient to invoke evutil_secure_rng_init(), or let Libevent take
+ care of calling evutil_secure_rng_init() on its own.
+
+ If you call this function as a _replacement_ for the regular
+ entropy sources, then you need to be sure that your input
+ contains a fairly large amount of strong entropy. Doing so is
+ notoriously hard: most people who try get it wrong. Watch out!
+
+ @param dat a buffer full of a strong source of random numbers
+ @param datlen the number of bytes to read from datlen
+ */
+EVENT2_EXPORT_SYMBOL
+void evutil_secure_rng_add_bytes(const char *dat, size_t datlen);
+#endif
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* EVENT1_EVUTIL_H_INCLUDED_ */
diff --git a/libevent/include/event2/visibility.h b/libevent/include/event2/visibility.h
new file mode 100644
index 0000000..006bbf0
--- /dev/null
+++ b/libevent/include/event2/visibility.h
@@ -0,0 +1,67 @@
+/* -*- Mode: C; tab-width: 4; c-basic-offset: 4; indent-tabs-mode: nil -*- */
+/*
+ * Copyright (c) 2007-2012 Niels Provos and Nick Mathewson
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ * derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+#ifndef EVENT2_VISIBILITY_H_INCLUDED_
+#define EVENT2_VISIBILITY_H_INCLUDED_
+
+#include <event2/event-config.h>
+
+#if defined(event_shared_EXPORTS) || \
+ defined(event_extra_shared_EXPORTS) || \
+ defined(event_core_shared_EXPORTS) || \
+ defined(event_pthreads_shared_EXPORTS) || \
+ defined(event_openssl_shared_EXPORTS)
+
+# if defined (__SUNPRO_C) && (__SUNPRO_C >= 0x550)
+# define EVENT2_EXPORT_SYMBOL __global
+# elif defined __GNUC__
+# define EVENT2_EXPORT_SYMBOL __attribute__ ((visibility("default")))
+# elif defined(_MSC_VER)
+# define EVENT2_EXPORT_SYMBOL __declspec(dllexport)
+# else
+# define EVENT2_EXPORT_SYMBOL /* unknown compiler */
+# endif
+
+#else /* event_*_EXPORTS */
+
+# define EVENT2_EXPORT_SYMBOL
+
+#endif /* event_*_EXPORTS */
+
+/** We need to dllimport event_debug_logging_mask_ into event_extra */
+#if defined(_MSC_VER)
+# if defined(event_core_shared_EXPORTS) /** from core export */
+# define EVENT2_CORE_EXPORT_SYMBOL __declspec(dllexport)
+# elif defined(event_extra_shared_EXPORTS) || /** from extra import */ \
+ defined(EVENT_VISIBILITY_WANT_DLLIMPORT)
+# define EVENT2_CORE_EXPORT_SYMBOL __declspec(dllimport)
+# endif
+#endif /* _MSC_VER */
+#if !defined(EVENT2_CORE_EXPORT_SYMBOL)
+# define EVENT2_CORE_EXPORT_SYMBOL EVENT2_EXPORT_SYMBOL
+#endif
+
+#endif /* EVENT2_VISIBILITY_H_INCLUDED_ */